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TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI

2020-01-20T16:40:32Z

Macarena.Liniers: /* References */

== Experimental campaign ==
2019 Autumn

== Proposal title ==
'''TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI#1 (Graphite) and NBI#2 (Stainless Steel)'''

== Name and affiliation of proponent ==
Macarena Liniers. División de Operación.

== Details of contact person at LNF ==
Macarena Liniers

== Description of the activity ==
Beam-wall interaction gives rise to a number of gas-emission processes that contribute to the pressure rise in the duct area during a beam injection pulse. The magnitude and dynamics of this contribution depend on the wall material and its conditioning status.
In TJ-II the protection plates at the final section of the ducts are made of different materials: graphite in NBI#1 and SS in NBI#2. The study of the local pressure behaviour can shed light on the gas desorption and re-emission mechanisms taking place at the beam wall interaction areas.
The local duct pressure is measured with Fast Ion gauges, with response times in the order of a few milliseconds. For the comparison to be meaningful the following conditions are necessary:
-The two ducts must be “conditioned”: the preliminary degasification after a long period of rest under atmospheric pressure (normally under inert gas atmosphere but also with exposure to air) must have been finalised: the gas dynamics must be dominated by hydrogen adsorption and desorption during the beam operation.
-The pumping speed at the calorimeter box, determining the gas flow at the duct, must be similar at the two injectors
-The beam power and beam perveance must be similar, so the beam-surface interaction areas are similar.
The experiment will run like this:
• Conditioning of both beam ducts will be monitored by the FIGs at the two ducts, at the beginning of the campaign
• Equal power beams will be injected (check gimbal position) on conditioned ducts with similar pumping at the Calorimeter boxes.
o The Pressure traces will be compared
o Temperature measurements at the TF plates will be compared.
In order to use the fast camera on both ducts these measurements must be made on different days
• Comparison of Temperature of the Beam Stop in pulses with/wo Magnetic field will give the total reionization fraction (25 mm lens, BS focus)
• Comparison of Temperature of the TF plate in pulses with/wo Magnetic field will give the fraction of the total reionization taking place in the duct section upstream from the TF (12 mm lens, TF focus)

== International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 2 hours+2 hours on different days
* Essential diagnostic systems:FIGs, IR Thermography, Halpha
* Type of plasmas (heating configuration): no Plasma. B/noB discharges with NBI injection
* Specific requirements on wall conditioning if any:same condition for the two experiment days
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates:10-02-2020 and 20/03/2020


== References ==
<references />
[1] Beamline duct monitoring of the TJ-II neutral beam injectors

M. Liniers, Gilles Wolfers, Jose Antonio Sebastián, Beatriz Rojo, Fernando Martín, Ricardo Carrasco, José Guasp, Félix Martín, Emilio Sánchez, Andrés Jiménez, Guillermo Merino, Marian Ochando, Kieran McCarthy, Enrique Ascasíbar, Bernardo Zurro, Alfonso Soleto y Javier Alonso

Fusion Engineering and Design 88 (2013) 960–963

[2] New infrared imaging diagnostic for the Neutral Beam Heating System at the TJ-II stellarator

M. Liniers, J.A. Quintana, B. Rojo, F. Martín-Díaz, F. Miguel, J.A. Sebastián, R. Carrasco, A. Soleto, E. Sánchez-Sarabia, A. Jiménez-Denche, C. Pastor, C. Rodríguez, J. Guasp, E. de la Cal, K.J. Mc Carthy, I. Pastor and E. Ascasíbar

Journal of Instrumentation, Volume 14, September 2019
3rd European Conference on Plasma Diagnostics (ECPD2019)

<hr>
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2020]]

TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI

2020-01-20T16:38:46Z

Macarena.Liniers: /* Description of the activity */

== Experimental campaign ==
2019 Autumn

== Proposal title ==
'''TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI#1 (Graphite) and NBI#2 (Stainless Steel)'''

== Name and affiliation of proponent ==
Macarena Liniers. División de Operación.

== Details of contact person at LNF ==
Macarena Liniers

== Description of the activity ==
Beam-wall interaction gives rise to a number of gas-emission processes that contribute to the pressure rise in the duct area during a beam injection pulse. The magnitude and dynamics of this contribution depend on the wall material and its conditioning status.
In TJ-II the protection plates at the final section of the ducts are made of different materials: graphite in NBI#1 and SS in NBI#2. The study of the local pressure behaviour can shed light on the gas desorption and re-emission mechanisms taking place at the beam wall interaction areas.
The local duct pressure is measured with Fast Ion gauges, with response times in the order of a few milliseconds. For the comparison to be meaningful the following conditions are necessary:
-The two ducts must be “conditioned”: the preliminary degasification after a long period of rest under atmospheric pressure (normally under inert gas atmosphere but also with exposure to air) must have been finalised: the gas dynamics must be dominated by hydrogen adsorption and desorption during the beam operation.
-The pumping speed at the calorimeter box, determining the gas flow at the duct, must be similar at the two injectors
-The beam power and beam perveance must be similar, so the beam-surface interaction areas are similar.
The experiment will run like this:
• Conditioning of both beam ducts will be monitored by the FIGs at the two ducts, at the beginning of the campaign
• Equal power beams will be injected (check gimbal position) on conditioned ducts with similar pumping at the Calorimeter boxes.
o The Pressure traces will be compared
o Temperature measurements at the TF plates will be compared.
In order to use the fast camera on both ducts these measurements must be made on different days
• Comparison of Temperature of the Beam Stop in pulses with/wo Magnetic field will give the total reionization fraction (25 mm lens, BS focus)
• Comparison of Temperature of the TF plate in pulses with/wo Magnetic field will give the fraction of the total reionization taking place in the duct section upstream from the TF (12 mm lens, TF focus)

== International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 2 hours+2 hours on different days
* Essential diagnostic systems:FIGs, IR Thermography, Halpha
* Type of plasmas (heating configuration): no Plasma. B/noB discharges with NBI injection
* Specific requirements on wall conditioning if any:same condition for the two experiment days
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates:10-02-2020 and 20/03/2020


== References ==
<references />
[1] Beamline duct monitoring of the TJ-II neutral beam injectors

M. Liniers, Gilles Wolfers, Jose Antonio Sebastián, Beatriz Rojo, Fernando Martín, Ricardo Carrasco, José Guasp, Félix Martín, Emilio Sánchez, Andrés Jiménez, Guillermo Merino, Marian Ochando, Kieran McCarthy, Enrique Ascasíbar, Bernardo Zurro, Alfonso Soleto y Javier Alonso

Fusion Engineering and Design 88 (2013) 960–963

[2] New infrared imaging diagnostic for the Neutral Beam Heating System at the TJ-II stellarator
M. Liniers, J.A. Quintana, B. Rojo, F. Martín-Díaz, F. Miguel, J.A. Sebastián, R. Carrasco, A. Soleto, E. Sánchez-Sarabia, A. Jiménez-Denche, C. Pastor, C. Rodríguez, J. Guasp, E. de la Cal, K.J. Mc Carthy, I. Pastor and E. Ascasíbar
Journal of Instrumentation, Volume 14, September 2019
3rd European Conference on Plasma Diagnostics (ECPD2019)

<hr>
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2020]]

TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI

2020-01-20T16:36:11Z

Macarena.Liniers: /* Description of the activity */

== Experimental campaign ==
2019 Autumn

== Proposal title ==
'''TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI#1 (Graphite) and NBI#2 (Stainless Steel)'''

== Name and affiliation of proponent ==
Macarena Liniers. División de Operación.

== Details of contact person at LNF ==
Macarena Liniers

== Description of the activity ==
Beam-wall interaction gives rise to a number of gas-emission processes that contribute to the pressure rise in the duct area during a beam injection pulse. The magnitude and dynamics of this contribution depend on the wall material and its conditioning status.
In TJ-II the protection plates at the final section of the ducts are made of different materials: graphite in NBI#1 and SS in NBI#2. The study of the local pressure behaviour can shed light on the gas desorption and re-emission mechanisms taking place at the beam wall interaction areas.
The local duct pressure is measured with Fast Ion gauges, with response times in the order of a few milliseconds. For the comparison to be meaningful the following conditions are necessary:
-The two ducts must be “conditioned”: the preliminary degasification after a long period of rest under atmospheric pressure (normally under inert gas atmosphere but also with exposure to air) must have been finalised: the gas dynamics must be dominated by hydrogen adsorption and desorption during the beam operation.
-The pumping speed at the calorimeter box, determining the gas flow at the duct, must be similar at the two injectors
-The beam power and beam perveance must be similar, so the beam-surface interaction areas are similar.
The experiment will run like this:
• Conditioning of both beam ducts will be monitored by the FIGs at the two ducts, at the beginning of the campaign
• Equal power beams will be injected (check gimbal position) on conditioned ducts with similar pumping at the Calorimeter boxes.
o The Pressure traces will be compared
o Temperature measurements at the TF plates will be compared
In order to use the fast camera on both ducts these measurements must be made on different days
• Comparison of Temperature of the Beam Stop in pulses with/wo Magnetic field will give the total reionization fraction (25 mm lens, BS focus)
• Comparison of Temperature of the TF plate in pulses with/wo Magnetic field will give the fraction of the total reionization taking place in the duct section upstream from the TF (12 mm lens, TF focus)

== International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 2 hours+2 hours on different days
* Essential diagnostic systems:FIGs, IR Thermography, Halpha
* Type of plasmas (heating configuration): no Plasma. B/noB discharges with NBI injection
* Specific requirements on wall conditioning if any:same condition for the two experiment days
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates:10-02-2020 and 20/03/2020


== References ==
<references />
[1] Beamline duct monitoring of the TJ-II neutral beam injectors

M. Liniers, Gilles Wolfers, Jose Antonio Sebastián, Beatriz Rojo, Fernando Martín, Ricardo Carrasco, José Guasp, Félix Martín, Emilio Sánchez, Andrés Jiménez, Guillermo Merino, Marian Ochando, Kieran McCarthy, Enrique Ascasíbar, Bernardo Zurro, Alfonso Soleto y Javier Alonso

Fusion Engineering and Design 88 (2013) 960–963

[2] New infrared imaging diagnostic for the Neutral Beam Heating System at the TJ-II stellarator
M. Liniers, J.A. Quintana, B. Rojo, F. Martín-Díaz, F. Miguel, J.A. Sebastián, R. Carrasco, A. Soleto, E. Sánchez-Sarabia, A. Jiménez-Denche, C. Pastor, C. Rodríguez, J. Guasp, E. de la Cal, K.J. Mc Carthy, I. Pastor and E. Ascasíbar
Journal of Instrumentation, Volume 14, September 2019
3rd European Conference on Plasma Diagnostics (ECPD2019)

<hr>
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2020]]

TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI

2020-01-20T16:32:21Z

Macarena.Liniers: Created page with "== Experimental campaign == 2019 Autumn == Proposal title == '''TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI#1 (Graphite) and NBI#2 (Stainless Steel)''' =..."

== Experimental campaign ==
2019 Autumn

== Proposal title ==
'''TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI#1 (Graphite) and NBI#2 (Stainless Steel)'''

== Name and affiliation of proponent ==
Macarena Liniers. División de Operación.

== Details of contact person at LNF ==
Macarena Liniers

== Description of the activity ==
Beam-wall interaction gives rise to a number of gas-emission processes that contribute to the pressure rise in the duct area during a beam injection pulse. The magnitude and dynamics of this contribution depend on the wall material and its conditioning status.
In TJ-II the protection plates at the final section of the ducts are made of different materials: graphite in NBI#1 and SS in NBI#2. The study of the local pressure behaviour can shed light on the gas desorption and re-emission mechanisms taking place at the beam wall interaction areas.
The local duct pressure is measured with Fast Ion gauges, with response times in the order of a few milliseconds. For the comparison to be meaningful the following conditions are necessary:
-The two ducts must be “conditioned”: the preliminary degasification after a long period of rest under atmospheric pressure (normally under inert gas atmosphere but also with exposure to air) must have been finalised: the gas dynamics must be dominated by hydrogen adsorption and desorption during the beam operation.
-The pumping speed at the calorimeter box, determining the gas flow at the duct, must be similar at the two injectors
-The beam power and beam perveance must be similar, so the beam-surface interaction areas are similar.
The experiment will run like this:
• Conditioning of both beam ducts will be monitored by the FIGs at the two ducts, at the beginning of the campaign
• Equal power beams will be injected (check gimbal position) on conditioned ducts with similar pumping at the Calorimeter boxes.
o The Pressure traces will be compared
o Temperature measurements at the TF plates will be compared
In order to use the fast camera on both ducts these measurements must be made on different days
• Comparison of Temperature of the Beam Stop in pulses with/wo Magnetic field will give the total reionization fraction (25 mm lens, BS focus)
• Comparison of Temperature of the TF plate in pulses with/wo Magnetic field will give the fraction of the total reionization taking place in the duct section upstream from the TF (12 mm lens, TF focus)

== International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 2 hours+2 hours on different days
* Essential diagnostic systems:FIGs, IR Thermography, Halpha
* Type of plasmas (heating configuration): no Plasma. B/noB discharges with NBI injection
* Specific requirements on wall conditioning if any:same condition for the two experiment days
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates:10-02-2020 and 20/03/2020


== References ==
<references />
[1] Beamline duct monitoring of the TJ-II neutral beam injectors

M. Liniers, Gilles Wolfers, Jose Antonio Sebastián, Beatriz Rojo, Fernando Martín, Ricardo Carrasco, José Guasp, Félix Martín, Emilio Sánchez, Andrés Jiménez, Guillermo Merino, Marian Ochando, Kieran McCarthy, Enrique Ascasíbar, Bernardo Zurro, Alfonso Soleto y Javier Alonso

Fusion Engineering and Design 88 (2013) 960–963

[2] New infrared imaging diagnostic for the Neutral Beam Heating System at the TJ-II stellarator
M. Liniers, J.A. Quintana, B. Rojo, F. Martín-Díaz, F. Miguel, J.A. Sebastián, R. Carrasco, A. Soleto, E. Sánchez-Sarabia, A. Jiménez-Denche, C. Pastor, C. Rodríguez, J. Guasp, E. de la Cal, K.J. Mc Carthy, I. Pastor and E. Ascasíbar
Journal of Instrumentation, Volume 14, September 2019
3rd European Conference on Plasma Diagnostics (ECPD2019)

<hr>
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2020]]

TJ-II:Plasma fueling experiments: influence of gas puffing distribution on plasma behaviour

2019-10-31T16:06:34Z

Macarena.Liniers: M. Liniers: Plasma fuelling experiments: influence of gas puffing distribution on plasma behavior

== Experimental campaign ==
2019 Autumn

== Proposal title ==
'''Plasma fuelling experiments: influence of gas puffing distribution on plasma behavior'''

== Name and affiliation of proponent ==
Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)

== Details of contact person at LNF (if applicable) ==
Enter contact person here or N/A

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Gas puffing in TJ-II is usually performed by means of a piezoelectric valve located in sector A8. The resulting gas pressure distribution, as measured by four Fast Ion Gauges symmetrically distributed around the torus, is highly non-symmetric for such gas pulses. This is due to the strong helicity of the vacuum chamber, which has a significant impact on the gas transport dynamics. The characteristic time of gas transport between two machine periods is of the order of the plasma pulse duration (100 ms).
In fact, the gas puffing system of TJ-II includes four piezoelectric valves symmetrically distributed around the machine.
The influence of the fuel sources distribution on plasma performance may be studied by using different combinations of piezo valves. The effect of the assymetries on the confinement may be readily observed.
Some improvement in the L-H transition conditions has been reported at Heliotron-E (S. Kobayashi, oral presentation at TJ-II, 26/03/2108): a lower power threshold was found as well as improved confinement, when using a toroidally distributed gas puffing.

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 1 day of operation
* Essential diagnostic systems:Plasma density, Temperature, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha, Plasma Energy
* Type of plasmas (heating configuration):ECH+NBI
* Specific requirements on wall conditioning if any:stable condition
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: 16-12-2019(format dd-mm-yyyy)

== References ==
<1/> S. Kobayashi,"Recent experimental results of Heliotron J:H mode and recent topics", Oral presentation at TJ-II Group meeting,CIEMAT, Spain, 23d March 2108

<hr> 
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2018]]

Main Page

2019-10-31T16:02:41Z

Macarena.Liniers: /* = Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)*/

= Experimental campaign ==
2019 Autumn

== Proposal title ==
Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling

== Name and affiliation of proponent =
Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)
== Details of contact person at LNF (if applicable) ==
Macarena Liniers
== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
To study the power balance of the injected beams, and their contribution to plasma fuelling, Infrared thermography of the NBI Beam Stop (BS) will be used.
The IR camera FLIR X6580sc, commissioned during the previous campaign, gave preliminary results on the “shine-trough” and reionization losses through the IR images of the “Beam Stop”. A correlation between reionization losses and local pressure at the beam duct was established.
The obtained IR images did not fully correspond to the expected behaviour of the BS material, a textured graphite with easy conductivity in the plate plane. The temperatures were higher than expected, and their time traces showed a “saturation” effect. A number of tests were performed to ascertain the thermal character of this behaviour. It was confirmed that the saturation is not a camera detector effect, but a “real” evolution of the IR radiance on the camera.
In order to perform a correct analysis of the thermal images, it is necessary to study the relative importance of the different effects that contribute to the plate temperature evolution, and to the IR radiance of the plate surface in the camera wave-length range (3.5-5 m). Aside from the heat conduction in the graphite plate bulk upon beam interception:
-thermal behaviour (conduction) of the layers of Li, B, and their compounds, that are deposited on the BS graphite during Li and B evaporation, and subsequent plasma operation
-Emissivity changes of the graphite surface with temperature due to the deposited layers
-Line emission of H0, Li, B, C and their compounds, in the 3.5-5.0 m range

In order to obtain the beam fraction deposited in the plasma, a well-defined correlation between the beam power intercepted by the BS, and the measured surface temperature must be found.
The high frame rate of the new camera will allow us to discriminate between fast processes (such as line-emission) and slow processes (thermal conduction), and thereby interpret the observed IR radiation behaviour.
TJ-II experimental campaign needs:
-As soon as the beams are ready (mid-May) beam pulses without B are required.
1. Spectrograms of the IR light (between 0.8-1.5 m ) coming from the BS area are necessary, to study relevant emission lines and determine their correlative lines in the 3.5-5 m range, and their intensity relative to the “background” grey body emission
2. Visible and UV spectra of light coming from the BS area, to study the species present and their contribution to radiance in the 3.5-5 m range
3. Capture IR images of the BS with increased frequency to study the Temperature rise and fall and compare with the time scales of the IR emission effects (grey body, line emission)
4. Perform beam power scans to study the correlation between BS temperature and Beam power
5. Perform a number of pulses with B to estimate the re-ionization losses
-Towards the end of the campaign:
6. Beam pulses on the Beam Calorimeter with the new 12 mm lens

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R
== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 2 days of operation + 2 beam pulses to be used for reference in several experiments
* Essential diagnostic systems:: IR spectroscopy, VUV spectroscopy plasma density, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha
* Type of plasmas (heating configuration):several different densities
* Specific requirements on wall conditioning if any:reference pulses one day previous to Li, one day next to Li
* External users: need a local computer account for data access: no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
One day in Mid-November (one day previous to Li, one day next to Li) and one day at end of campaign

== References ==
<references /> 
-M. Liniers et al., New infrared imaging diagnostic for the Neutral Beam Heating System at the TJ-II stellarator
Journal of Instrumentation, Volume 14, September 2019
3rd European Conference on Plasma Diagnostics (ECPD2019)

[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Autumn 2018]]

== Name and affiliation of proponent =
Paco Tabares, Eider Oyarzabal, David Tafalla
== Details of contact person at LNF (if applicable) ==
Paco Tabares
== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Continuation of previous experiments: Insertion of Sn, LiSn and Li fingers in CPS support
== If applicable, International or National funding project or entity ==
1P120 MINECO, TF LMD EuroFusion
== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation:
* Essential diagnostic systems:
* Type of plasmas (heating configuration):
* Specific requirements on wall conditioning if any:
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:
Biasing Power source ad Control
== Preferred dates and degree of flexibility ==
10-03-2018 to 05-06-2018

== References ==
<references /> 
F L Tabares et al. Experimental tests of LiSn alloys as potential liquid metal for the Divertor target in a Fusion Reactor. Nucl Mat Ene. (2017) in press<hr>
F L Tabares et al Comparative studies of Li and LiSn…. Phys Scripta 2017 (in press)
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Autum 2019]]

Main Page

2019-10-31T15:40:45Z

Macarena.Liniers: /* Experimental campaign = */

TJ-II:Plasma fueling experiments: influence of gas puffing distribution on plasma behaviour

2018-04-10T15:11:07Z

Macarena.Liniers: /* References */

== Experimental campaign ==
2018 Spring

== Proposal title ==
'''Plasma fuelling experiments: influence of gas puffing distribution on plasma behavior'''

== Name and affiliation of proponent ==
Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)

== Details of contact person at LNF (if applicable) ==
Enter contact person here or N/A

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Gas puffing in TJ-II is usually performed by means of a piezoelectric valve located in sector A8. The resulting gas pressure distribution, as measured by four Fast Ion Gauges symmetrically distributed around the torus, is highly non-symmetric for such gas pulses. This is due to the strong helicity of the vacuum chamber, which has a significant impact on the gas transport dynamics. The characteristic time of gas transport between two machine periods is of the order of the plasma pulse duration (100 ms).
In fact, the gas puffing system of TJ-II includes four piezoelectric valves symmetrically distributed around the machine.
The influence of the fuel sources distribution on plasma performance may be studied by using different combinations of piezo valves. The effect of the assymetries on the confinement may be readily observed.
Some improvement in the L-H transition conditions has been reported at Heliotron-E (S. Kobayashi, oral presentation at TJ-II, 26/03/2108): a lower power threshold was found as well as improved confinement, when using a toroidally distributed gas puffing.

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 1 day of operation
* Essential diagnostic systems:Plasma density, Temperature, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha, Plasma Energy
* Type of plasmas (heating configuration):ECH+NBI
* Specific requirements on wall conditioning if any:stable condition
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: (format dd-mm-yyyy)

== References ==
<1/> S. Kobayashi,"Recent experimental results of Heliotron J:H mode and recent topics", Oral presentation at TJ-II Group meeting,CIEMAT, Spain, 23d March 2108

<hr> 
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2018]]

TJ-II:Plasma fueling experiments: influence of gas puffing distribution on plasma behaviour

2018-04-10T15:10:36Z

Macarena.Liniers: /* References */

== Experimental campaign ==
2018 Spring

== Proposal title ==
'''Plasma fuelling experiments: influence of gas puffing distribution on plasma behavior'''

== Name and affiliation of proponent ==
Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)

== Details of contact person at LNF (if applicable) ==
Enter contact person here or N/A

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Gas puffing in TJ-II is usually performed by means of a piezoelectric valve located in sector A8. The resulting gas pressure distribution, as measured by four Fast Ion Gauges symmetrically distributed around the torus, is highly non-symmetric for such gas pulses. This is due to the strong helicity of the vacuum chamber, which has a significant impact on the gas transport dynamics. The characteristic time of gas transport between two machine periods is of the order of the plasma pulse duration (100 ms).
In fact, the gas puffing system of TJ-II includes four piezoelectric valves symmetrically distributed around the machine.
The influence of the fuel sources distribution on plasma performance may be studied by using different combinations of piezo valves. The effect of the assymetries on the confinement may be readily observed.
Some improvement in the L-H transition conditions has been reported at Heliotron-E (S. Kobayashi, oral presentation at TJ-II, 26/03/2108): a lower power threshold was found as well as improved confinement, when using a toroidally distributed gas puffing.

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 1 day of operation
* Essential diagnostic systems:Plasma density, Temperature, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha, Plasma Energy
* Type of plasmas (heating configuration):ECH+NBI
* Specific requirements on wall conditioning if any:stable condition
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: (format dd-mm-yyyy)

== References ==
<1/> S. Kobayashi,"Recent experimental results of Heliotron J:H mode and recent topics", Oral presentation at TJ-II Group meeting,CIEMAT, Spain, 23d March 2108-->

<hr> 
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2018]]

TJ-II:Plasma fueling experiments: influence of gas puffing distribution on plasma behaviour

2018-04-10T15:09:54Z

Macarena.Liniers: /* References */

== Experimental campaign ==
2018 Spring

== Proposal title ==
'''Plasma fuelling experiments: influence of gas puffing distribution on plasma behavior'''

== Name and affiliation of proponent ==
Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)

== Details of contact person at LNF (if applicable) ==
Enter contact person here or N/A

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Gas puffing in TJ-II is usually performed by means of a piezoelectric valve located in sector A8. The resulting gas pressure distribution, as measured by four Fast Ion Gauges symmetrically distributed around the torus, is highly non-symmetric for such gas pulses. This is due to the strong helicity of the vacuum chamber, which has a significant impact on the gas transport dynamics. The characteristic time of gas transport between two machine periods is of the order of the plasma pulse duration (100 ms).
In fact, the gas puffing system of TJ-II includes four piezoelectric valves symmetrically distributed around the machine.
The influence of the fuel sources distribution on plasma performance may be studied by using different combinations of piezo valves. The effect of the assymetries on the confinement may be readily observed.
Some improvement in the L-H transition conditions has been reported at Heliotron-E (S. Kobayashi, oral presentation at TJ-II, 26/03/2108): a lower power threshold was found as well as improved confinement, when using a toroidally distributed gas puffing.

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 1 day of operation
* Essential diagnostic systems:Plasma density, Temperature, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha, Plasma Energy
* Type of plasmas (heating configuration):ECH+NBI
* Specific requirements on wall conditioning if any:stable condition
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: (format dd-mm-yyyy)

== References ==
<1/> <S. Kobayashi,"Recent experimental results of Heliotron J:H mode and recent topics", Oral presentation at TJ-II Group meeting,CIEMAT, Spain, 23d March 2108-->

<hr> 
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2018]]

TJ-II:Plasma fueling experiments: influence of gas puffing distribution on plasma behaviour

2018-04-10T15:06:57Z

Macarena.Liniers: /* References */

== Experimental campaign ==
2018 Spring

== Proposal title ==
'''Plasma fuelling experiments: influence of gas puffing distribution on plasma behavior'''

== Name and affiliation of proponent ==
Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)

== Details of contact person at LNF (if applicable) ==
Enter contact person here or N/A

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Gas puffing in TJ-II is usually performed by means of a piezoelectric valve located in sector A8. The resulting gas pressure distribution, as measured by four Fast Ion Gauges symmetrically distributed around the torus, is highly non-symmetric for such gas pulses. This is due to the strong helicity of the vacuum chamber, which has a significant impact on the gas transport dynamics. The characteristic time of gas transport between two machine periods is of the order of the plasma pulse duration (100 ms).
In fact, the gas puffing system of TJ-II includes four piezoelectric valves symmetrically distributed around the machine.
The influence of the fuel sources distribution on plasma performance may be studied by using different combinations of piezo valves. The effect of the assymetries on the confinement may be readily observed.
Some improvement in the L-H transition conditions has been reported at Heliotron-E (S. Kobayashi, oral presentation at TJ-II, 26/03/2108): a lower power threshold was found as well as improved confinement, when using a toroidally distributed gas puffing.

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 1 day of operation
* Essential diagnostic systems:Plasma density, Temperature, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha, Plasma Energy
* Type of plasmas (heating configuration):ECH+NBI
* Specific requirements on wall conditioning if any:stable condition
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: (format dd-mm-yyyy)

== References ==
<1/> <S. Kobayashi, -->

<hr> 
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2018]]

TJ-II:Plasma fueling experiments: influence of gas puffing distribution on plasma behaviour

2018-04-10T15:05:46Z

Macarena.Liniers: /* Proposal title */

== Experimental campaign ==
2018 Spring

== Proposal title ==
'''Plasma fuelling experiments: influence of gas puffing distribution on plasma behavior'''

== Name and affiliation of proponent ==
Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)

== Details of contact person at LNF (if applicable) ==
Enter contact person here or N/A

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Gas puffing in TJ-II is usually performed by means of a piezoelectric valve located in sector A8. The resulting gas pressure distribution, as measured by four Fast Ion Gauges symmetrically distributed around the torus, is highly non-symmetric for such gas pulses. This is due to the strong helicity of the vacuum chamber, which has a significant impact on the gas transport dynamics. The characteristic time of gas transport between two machine periods is of the order of the plasma pulse duration (100 ms).
In fact, the gas puffing system of TJ-II includes four piezoelectric valves symmetrically distributed around the machine.
The influence of the fuel sources distribution on plasma performance may be studied by using different combinations of piezo valves. The effect of the assymetries on the confinement may be readily observed.
Some improvement in the L-H transition conditions has been reported at Heliotron-E (S. Kobayashi, oral presentation at TJ-II, 26/03/2108): a lower power threshold was found as well as improved confinement, when using a toroidally distributed gas puffing.

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 1 day of operation
* Essential diagnostic systems:Plasma density, Temperature, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha, Plasma Energy
* Type of plasmas (heating configuration):ECH+NBI
* Specific requirements on wall conditioning if any:stable condition
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: (format dd-mm-yyyy)

== References ==
<references /> 

<hr> 
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2018]]

TJ-II:Plasma fueling experiments: influence of gas puffing distribution on plasma behaviour

2018-04-10T15:05:25Z

Macarena.Liniers: Created page with "== Experimental campaign == 2018 Spring == Proposal title == '''Plasma fueling experiments: influence of gas puffing distribution on plasma behavior''' == Name and affiliati..."

== Experimental campaign ==
2018 Spring

== Proposal title ==
'''Plasma fueling experiments: influence of gas puffing distribution on plasma behavior'''

== Name and affiliation of proponent ==
Macarena Liniers Vázquez (Laboratorio Nacional de Fusión)

== Details of contact person at LNF (if applicable) ==
Enter contact person here or N/A

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Gas puffing in TJ-II is usually performed by means of a piezoelectric valve located in sector A8. The resulting gas pressure distribution, as measured by four Fast Ion Gauges symmetrically distributed around the torus, is highly non-symmetric for such gas pulses. This is due to the strong helicity of the vacuum chamber, which has a significant impact on the gas transport dynamics. The characteristic time of gas transport between two machine periods is of the order of the plasma pulse duration (100 ms).
In fact, the gas puffing system of TJ-II includes four piezoelectric valves symmetrically distributed around the machine.
The influence of the fuel sources distribution on plasma performance may be studied by using different combinations of piezo valves. The effect of the assymetries on the confinement may be readily observed.
Some improvement in the L-H transition conditions has been reported at Heliotron-E (S. Kobayashi, oral presentation at TJ-II, 26/03/2108): a lower power threshold was found as well as improved confinement, when using a toroidally distributed gas puffing.

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 1 day of operation
* Essential diagnostic systems:Plasma density, Temperature, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha, Plasma Energy
* Type of plasmas (heating configuration):ECH+NBI
* Specific requirements on wall conditioning if any:stable condition
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: (format dd-mm-yyyy)

== References ==
<references /> 

<hr> 
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2018]]

TJ-II:Experimental proposals

2018-03-20T17:25:40Z

Macarena.Liniers: /* Experimental proposals, 2018 Spring */

[[File:TJII_model.jpg|400px|thumb|right|TJ-II Model]]

== Creation of a new proposal ==

# Log in to the FusionWiki. If you don't have an account, request one by clicking 'Create account' in the left-hand menu.
# ''Type the name of your proposal page in the field below''. The required format is: 'TJ-II:Title of my proposal' (without the apostrophes). Note the 'TJ-II:' at the beginning!
# Click 'Create new proposal'. Your proposal page will be created. Edit and save (please use 'Show preview' before saving the final version).

<inputbox>
type=create
default=TJ-II:Title of my proposal
buttonlabel=Create new proposal with this title
preload=TJ-II:Proposal_template
</inputbox>

The proposal page is created on the basis of this [[TJ-II:Proposal template|Proposal template]]. You do not need to view or modify it.

== Inclusion of your proposal in the proposal list ==

* Edit the table below and add your proposal (instructions in the table).
* The link to your proposal is as follows: <nowiki>[[TJ-II:Title of your proposal|]]</nowiki> (the final character before the closing brackets <nowiki>]]</nowiki> is a vertical slash).

== Experimental proposals, 2018 Spring==
Deadline: March 7, 2018

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator|Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator]]
 | [mailto:josepmaria.fontdecaba@ciemat.es J.M. Fontdecaba]



|-
 | 2
 | [[TJ-II:Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic|Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic]]
 | [mailto:ridhimas757@gmail.com R. Sharma]

|-
 | 3
 | [[TJ-II:Validation of bootstrap predictions|Validation of bootstrap predictions]]
 | [mailto:joseluis.velasco@ciemat.es J.L.Velasco]

|-
 | 4
 | [[TJ-II:Transport analysis by means of the Transfer Entropy|Transport analysis by means of the Transfer Entropy]]
 | [mailto:boudewijn.vanmilligen@ciemat.es B.Ph. van Milligen]

|-
 | 5
 | [[TJ-II:Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas|Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es K J McCarthy]

|-
 | 6
 | [[TJ-II:Improving fuelling efficiency in TJ-II ECRH plasmas|Improving fuelling efficiency in TJ-II ECRH plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es M Calvo]

|-
 | 7
 | [[TJ-II:The influence of a core fast electron population on pellet fuelling efficiency in TJ-II|The influence of a core fast electron population on pellet fuelling efficiency in TJ-II]]
 | [mailto:nerea.panadero@externos.ciemat.es N Panadero]

|-
 | 8
 | [[TJ-II:Studies of LIquid Metal insertion in TJ-II|Studies of LIquid Metal insertion in TJ-II]]
 | [mailto:tabares@ciemat.es P.Tabares]

|-
 | 9
 | [[TJ-II:Fast Camera studies with triple bundle|Fast Camera studies with triple bundle]]
 | [mailto:e.delacal@ciemat.es E. de la Cal]

|-
 | 10
 | [[TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas|Validation of ECCD predictions in TJ-II ECRH plasmas]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 11
 | [[TJ-II:Radiation asymmetries and potential variations|Radiation asymmetries and potential variations]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 12
 | [[TJ-II:Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry|Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry]]
 | [mailto:teresa.estrada@ciemat.es Teresa Estrada]

|-
 | 13
 | [[TJ-II:Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II|Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II]]
 | [mailto:Bing.Liu@swjtu.edu.cn Bing Liu]

|-
 | 14
 | [[TJ-II:Blobs vs streamers|Blobs vs streamers]]
 | [mailto:Boudewijn.vanMilligen@ciemat.es B.Ph. van Milligen]

|-
 | 15
 | [[TJ-II:Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II|Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-
 | 16
 | [[TJ-II: Evaluation of Neoclassical transport correction terms in TJ-II|Evaluation of Neoclassical transport correction terms in TJ-II]]
 | [mailto:daniel.carralero@ciemat.es Daniel Carralero]

|-
 | 17
 | [[TJ-II:Turbulence studies during transient pellet induced regimes|Turbulence studies during transient pellet induced regimes]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran J McCarthy]

|-
 | 18
 | [[TJ-II:Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es M. Liniers]

|-

== Experimental proposals, 2017 Spring==
Deadline: January 26, 2017

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Search for physical mechanisms that lead to increase of turbulence following pellet injection|Search for physical mechanisms that lead to increase of turbulence following pellet injection]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]


|-
 | 2
 | [[TJ-II:Effect of pellet injection on the radial electric field profile of stellarators|Effect of pellet injection on the radial electric field profile of stellarators]]
 | [mailto:silvagnidavide1@gmail.com,joseluis.velasco@ciemat.es Davide Silvagni, José L. Velasco]


|-
 | 3
 | [[TJ-II:Excitation of zonal flow oscillations by energetic particles|Excitation of zonal flow oscillations by energetic particles]]
 | [mailto:edi.sanchez@ciemat.es Edi Sánchez]


|-
 | 4
 | [[TJ-II:Radial electric field of low-magnetic-field low-collisionality NBI plasmas|Radial electric field of low-magnetic-field low-collisionality NBI plasmas]]
 | [mailto:joseluis.velasco@ciemat.es José L. Velasco]


|-
 | 5
 | [[TJ-II:Comparison of transport of on-axis and off-axis ECH-heated plasmas|Comparison of transport of on-axis and off-axis ECH-heated plasmas]]
 | [mailto:joseluis.velasco@ciemat.es,edi.sanchez@ciemat.es José L. Velasco, Edi Sánchez]
|-

 | 6
 | [[TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport|Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-

 | 7
 | [[TJ-II:PelletFuelling|PelletFuelling]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]

|-

 | 8
 | [[TJ-II:Impurity density and potential asymmetries|Impurity density and potential asymmetries]]
 | [mailto:jose.regana@ciemat.es José M. García Regaña]

|-

 | 9
 | [[TJ-II:Investigation of turbulence spreading and information transfer in the TJ-II stellarator|Investigation of turbulence spreading and information transfer in the TJ-II stellarator]]
 | [mailto:boudewijn.vanmilligen@ciemat.es Boudewijn van Milligen]

|-

 | 10
 | [[TJ-II:Role of isotope effect on biasing induced transitions in the TJ-II stellarator|Role of isotope effect on biasing induced transitions in the TJ-II stellarator]]
 | [mailto:carlos.hidalgo@ciemat.es S. Ohshima]

|-

 | 11
 | [[TJ-II:Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J|Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J]]
 | [mailto:bing.liu@externos.ciemat.es,ulises.losada@ciemat.es Bing Liu, Ulises Losada]

|-

 | 12
 | [[TJ-II: Alfven Eigenmodes and biasing in TJ-II| Alfven Eigenmodes and biasing in TJ-II]]
 | [mailto:melnikov_07@yahoo.com A. Melnikov]

|-

 | 13
 | [[TJ-II: Potential asymmetries at low magnetic field | Potential asymmetries at low magnetic field ]]
 | [mailto:jose.regana@ciemat.es José M. García-Regaña]
|-

 | 14
 | [[TJ-II:NBI contribution to plasma fuelling|NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es Macarena Liniers]

|-

 | 15
 | [[TJ-II: Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations|Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations]]
 | [mailto:Edi.sanchez@ciemat.es Edi Sanchez]

|-

 | 16
 | [[TJ-II:Effect of ECRH on the characteristics of Alfven Eigenmodes activity|Effect of ECRH on the characteristics of Alfven Eigenmodes activity]]
 | [mailto:alvaro.cappa@ciemat.es,enrique.ascasibar@ciemat.es,francisco.castejon@ciemat.es Álvaro Cappa, Enrique Ascasíbar, Paco Castejón]

|-

 | 17
 | [[TJ-II:Investigating the Alfvén Wave damping|Investigating the Alfvén Wave damping]]
 | [mailto:francisco.castejon@ciemat.es Paco Castejón, Álvaro Cappa, Enrique Ascasíbar]

|-

 | 18
 | [[TJ-II:L-H Transition and Isotope Effect in low magnetic ripple configurations|L-H Transition and Isotope Effect in low magnetic ripple configurations]]
 | [mailto:teresa.estrada@ciemat.es,Ulises.LosadaRodriguez@ciemat.es,Carlos.Hidalgo@ciemat.es Teresa Estrada,Ulises Losada,Carlos Hidalgo]

|-

 | 19
 | [[TJ-II:Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry|Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry]]
 | [mailto:teresa.estrada@ciemat.es,javier.pinzon@ipp.mpg.de,tim.happel@ipp.mpg.de Javier Pinzon, Tim Happel,Teresa Estrada]

|-

 | 20
 | [[TJ-II:Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter|Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter]]
 | [mailto:e.delacal@ciemat.es, Eduardo de la Cal]

|-
|}

== See also ==

* [[TJ-II:Experimental program]] (current)
* [http://intranet-fusion.ciemat.es/document-server/tj-ii-experimental-program/ Experimental programs for earlier years (2002-2016)] (Intranet, password required)

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals]]

TJ-II:Experimental proposals

2018-03-20T17:24:50Z

Macarena.Liniers: /* Experimental proposals, 2018 Spring */

[[File:TJII_model.jpg|400px|thumb|right|TJ-II Model]]

== Creation of a new proposal ==

# Log in to the FusionWiki. If you don't have an account, request one by clicking 'Create account' in the left-hand menu.
# ''Type the name of your proposal page in the field below''. The required format is: 'TJ-II:Title of my proposal' (without the apostrophes). Note the 'TJ-II:' at the beginning!
# Click 'Create new proposal'. Your proposal page will be created. Edit and save (please use 'Show preview' before saving the final version).

<inputbox>
type=create
default=TJ-II:Title of my proposal
buttonlabel=Create new proposal with this title
preload=TJ-II:Proposal_template
</inputbox>

The proposal page is created on the basis of this [[TJ-II:Proposal template|Proposal template]]. You do not need to view or modify it.

== Inclusion of your proposal in the proposal list ==

* Edit the table below and add your proposal (instructions in the table).
* The link to your proposal is as follows: <nowiki>[[TJ-II:Title of your proposal|]]</nowiki> (the final character before the closing brackets <nowiki>]]</nowiki> is a vertical slash).

== Experimental proposals, 2018 Spring==
Deadline: March 7, 2018

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator|Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator]]
 | [mailto:josepmaria.fontdecaba@ciemat.es J.M. Fontdecaba]



|-
 | 2
 | [[TJ-II:Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic|Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic]]
 | [mailto:ridhimas757@gmail.com R. Sharma]

|-
 | 3
 | [[TJ-II:Validation of bootstrap predictions|Validation of bootstrap predictions]]
 | [mailto:joseluis.velasco@ciemat.es J.L.Velasco]

|-
 | 4
 | [[TJ-II:Transport analysis by means of the Transfer Entropy|Transport analysis by means of the Transfer Entropy]]
 | [mailto:boudewijn.vanmilligen@ciemat.es B.Ph. van Milligen]

|-
 | 5
 | [[TJ-II:Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas|Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es K J McCarthy]

|-
 | 6
 | [[TJ-II:Improving fuelling efficiency in TJ-II ECRH plasmas|Improving fuelling efficiency in TJ-II ECRH plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es M Calvo]

|-
 | 7
 | [[TJ-II:The influence of a core fast electron population on pellet fuelling efficiency in TJ-II|The influence of a core fast electron population on pellet fuelling efficiency in TJ-II]]
 | [mailto:nerea.panadero@externos.ciemat.es N Panadero]

|-
 | 8
 | [[TJ-II:Studies of LIquid Metal insertion in TJ-II|Studies of LIquid Metal insertion in TJ-II]]
 | [mailto:tabares@ciemat.es P.Tabares]

|-
 | 9
 | [[TJ-II:Fast Camera studies with triple bundle|Fast Camera studies with triple bundle]]
 | [mailto:e.delacal@ciemat.es E. de la Cal]

|-
 | 10
 | [[TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas|Validation of ECCD predictions in TJ-II ECRH plasmas]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 11
 | [[TJ-II:Radiation asymmetries and potential variations|Radiation asymmetries and potential variations]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 12
 | [[TJ-II:Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry|Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry]]
 | [mailto:teresa.estrada@ciemat.es Teresa Estrada]

|-
 | 13
 | [[TJ-II:Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II|Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II]]
 | [mailto:Bing.Liu@swjtu.edu.cn Bing Liu]

|-
 | 14
 | [[TJ-II:Blobs vs streamers|Blobs vs streamers]]
 | [mailto:Boudewijn.vanMilligen@ciemat.es B.Ph. van Milligen]

|-
 | 15
 | [[TJ-II:Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II|Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-
 | 16
 | [[TJ-II: Evaluation of Neoclassical transport correction terms in TJ-II|Evaluation of Neoclassical transport correction terms in TJ-II]]
 | [mailto:daniel.carralero@ciemat.es Daniel Carralero]

|-
 | 17
 | [[TJ-II:Turbulence studies during transient pellet induced regimes|Turbulence studies during transient pellet induced regimes]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran J McCarthy]

|-
 | 18
 | [[TJ-II:Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es M. Liniers]


== Experimental proposals, 2017 Spring==
Deadline: January 26, 2017

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Search for physical mechanisms that lead to increase of turbulence following pellet injection|Search for physical mechanisms that lead to increase of turbulence following pellet injection]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]


|-
 | 2
 | [[TJ-II:Effect of pellet injection on the radial electric field profile of stellarators|Effect of pellet injection on the radial electric field profile of stellarators]]
 | [mailto:silvagnidavide1@gmail.com,joseluis.velasco@ciemat.es Davide Silvagni, José L. Velasco]


|-
 | 3
 | [[TJ-II:Excitation of zonal flow oscillations by energetic particles|Excitation of zonal flow oscillations by energetic particles]]
 | [mailto:edi.sanchez@ciemat.es Edi Sánchez]


|-
 | 4
 | [[TJ-II:Radial electric field of low-magnetic-field low-collisionality NBI plasmas|Radial electric field of low-magnetic-field low-collisionality NBI plasmas]]
 | [mailto:joseluis.velasco@ciemat.es José L. Velasco]


|-
 | 5
 | [[TJ-II:Comparison of transport of on-axis and off-axis ECH-heated plasmas|Comparison of transport of on-axis and off-axis ECH-heated plasmas]]
 | [mailto:joseluis.velasco@ciemat.es,edi.sanchez@ciemat.es José L. Velasco, Edi Sánchez]
|-

 | 6
 | [[TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport|Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-

 | 7
 | [[TJ-II:PelletFuelling|PelletFuelling]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]

|-

 | 8
 | [[TJ-II:Impurity density and potential asymmetries|Impurity density and potential asymmetries]]
 | [mailto:jose.regana@ciemat.es José M. García Regaña]

|-

 | 9
 | [[TJ-II:Investigation of turbulence spreading and information transfer in the TJ-II stellarator|Investigation of turbulence spreading and information transfer in the TJ-II stellarator]]
 | [mailto:boudewijn.vanmilligen@ciemat.es Boudewijn van Milligen]

|-

 | 10
 | [[TJ-II:Role of isotope effect on biasing induced transitions in the TJ-II stellarator|Role of isotope effect on biasing induced transitions in the TJ-II stellarator]]
 | [mailto:carlos.hidalgo@ciemat.es S. Ohshima]

|-

 | 11
 | [[TJ-II:Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J|Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J]]
 | [mailto:bing.liu@externos.ciemat.es,ulises.losada@ciemat.es Bing Liu, Ulises Losada]

|-

 | 12
 | [[TJ-II: Alfven Eigenmodes and biasing in TJ-II| Alfven Eigenmodes and biasing in TJ-II]]
 | [mailto:melnikov_07@yahoo.com A. Melnikov]

|-

 | 13
 | [[TJ-II: Potential asymmetries at low magnetic field | Potential asymmetries at low magnetic field ]]
 | [mailto:jose.regana@ciemat.es José M. García-Regaña]
|-

 | 14
 | [[TJ-II:NBI contribution to plasma fuelling|NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es Macarena Liniers]

|-

 | 15
 | [[TJ-II: Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations|Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations]]
 | [mailto:Edi.sanchez@ciemat.es Edi Sanchez]

|-

 | 16
 | [[TJ-II:Effect of ECRH on the characteristics of Alfven Eigenmodes activity|Effect of ECRH on the characteristics of Alfven Eigenmodes activity]]
 | [mailto:alvaro.cappa@ciemat.es,enrique.ascasibar@ciemat.es,francisco.castejon@ciemat.es Álvaro Cappa, Enrique Ascasíbar, Paco Castejón]

|-

 | 17
 | [[TJ-II:Investigating the Alfvén Wave damping|Investigating the Alfvén Wave damping]]
 | [mailto:francisco.castejon@ciemat.es Paco Castejón, Álvaro Cappa, Enrique Ascasíbar]

|-

 | 18
 | [[TJ-II:L-H Transition and Isotope Effect in low magnetic ripple configurations|L-H Transition and Isotope Effect in low magnetic ripple configurations]]
 | [mailto:teresa.estrada@ciemat.es,Ulises.LosadaRodriguez@ciemat.es,Carlos.Hidalgo@ciemat.es Teresa Estrada,Ulises Losada,Carlos Hidalgo]

|-

 | 19
 | [[TJ-II:Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry|Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry]]
 | [mailto:teresa.estrada@ciemat.es,javier.pinzon@ipp.mpg.de,tim.happel@ipp.mpg.de Javier Pinzon, Tim Happel,Teresa Estrada]

|-

 | 20
 | [[TJ-II:Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter|Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter]]
 | [mailto:e.delacal@ciemat.es, Eduardo de la Cal]

|-
|}

== See also ==

* [[TJ-II:Experimental program]] (current)
* [http://intranet-fusion.ciemat.es/document-server/tj-ii-experimental-program/ Experimental programs for earlier years (2002-2016)] (Intranet, password required)

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals]]

TJ-II:Experimental proposals

2018-03-20T17:15:30Z

Macarena.Liniers: /* Experimental proposals, 2018 Spring */

[[File:TJII_model.jpg|400px|thumb|right|TJ-II Model]]

== Creation of a new proposal ==

# Log in to the FusionWiki. If you don't have an account, request one by clicking 'Create account' in the left-hand menu.
# ''Type the name of your proposal page in the field below''. The required format is: 'TJ-II:Title of my proposal' (without the apostrophes). Note the 'TJ-II:' at the beginning!
# Click 'Create new proposal'. Your proposal page will be created. Edit and save (please use 'Show preview' before saving the final version).

<inputbox>
type=create
default=TJ-II:Title of my proposal
buttonlabel=Create new proposal with this title
preload=TJ-II:Proposal_template
</inputbox>

The proposal page is created on the basis of this [[TJ-II:Proposal template|Proposal template]]. You do not need to view or modify it.

== Inclusion of your proposal in the proposal list ==

* Edit the table below and add your proposal (instructions in the table).
* The link to your proposal is as follows: <nowiki>[[TJ-II:Title of your proposal|]]</nowiki> (the final character before the closing brackets <nowiki>]]</nowiki> is a vertical slash).

== Experimental proposals, 2018 Spring==
Deadline: March 7, 2018

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator|Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator]]
 | [mailto:josepmaria.fontdecaba@ciemat.es J.M. Fontdecaba]



|-
 | 2
 | [[TJ-II:Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic|Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic]]
 | [mailto:ridhimas757@gmail.com R. Sharma]

|-
 | 3
 | [[TJ-II:Validation of bootstrap predictions|Validation of bootstrap predictions]]
 | [mailto:joseluis.velasco@ciemat.es J.L.Velasco]

|-
 | 4
 | [[TJ-II:Transport analysis by means of the Transfer Entropy|Transport analysis by means of the Transfer Entropy]]
 | [mailto:boudewijn.vanmilligen@ciemat.es B.Ph. van Milligen]

|-
 | 5
 | [[TJ-II:Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas|Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es K J McCarthy]

|-
 | 6
 | [[TJ-II:Improving fuelling efficiency in TJ-II ECRH plasmas|Improving fuelling efficiency in TJ-II ECRH plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es M Calvo]

|-
 | 7
 | [[TJ-II:The influence of a core fast electron population on pellet fuelling efficiency in TJ-II|The influence of a core fast electron population on pellet fuelling efficiency in TJ-II]]
 | [mailto:nerea.panadero@externos.ciemat.es N Panadero]

|-
 | 8
 | [[TJ-II:Studies of LIquid Metal insertion in TJ-II|Studies of LIquid Metal insertion in TJ-II]]
 | [mailto:tabares@ciemat.es P.Tabares]

|-
 | 9
 | [[TJ-II:Fast Camera studies with triple bundle|Fast Camera studies with triple bundle]]
 | [mailto:e.delacal@ciemat.es E. de la Cal]

|-
 | 10
 | [[TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas|Validation of ECCD predictions in TJ-II ECRH plasmas]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 11
 | [[TJ-II:Radiation asymmetries and potential variations|Radiation asymmetries and potential variations]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 12
 | [[TJ-II:Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry|Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry]]
 | [mailto:teresa.estrada@ciemat.es Teresa Estrada]

|-
 | 13
 | [[TJ-II:Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II|Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II]]
 | [mailto:Bing.Liu@swjtu.edu.cn Bing Liu]

|-
 | 14
 | [[TJ-II:Blobs vs streamers|Blobs vs streamers]]
 | [mailto:Boudewijn.vanMilligen@ciemat.es B.Ph. van Milligen]

|-
 | 15
 | [[TJ-II:Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II|Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-
 | 16
 | [[TJ-II: Evaluation of Neoclassical transport correction terms in TJ-II|Evaluation of Neoclassical transport correction terms in TJ-II]]
 | [mailto:daniel.carralero@ciemat.es Daniel Carralero]

|-
 | 17
 | [[TJ-II:Turbulence studies during transient pellet induced regimes|Turbulence studies during transient pellet induced regimes]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran J McCarthy]

|-
|}

|-
 | 18
 | [[TJ-II:Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es M. Liniers]


== Experimental proposals, 2017 Spring==
Deadline: January 26, 2017

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Search for physical mechanisms that lead to increase of turbulence following pellet injection|Search for physical mechanisms that lead to increase of turbulence following pellet injection]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]


|-
 | 2
 | [[TJ-II:Effect of pellet injection on the radial electric field profile of stellarators|Effect of pellet injection on the radial electric field profile of stellarators]]
 | [mailto:silvagnidavide1@gmail.com,joseluis.velasco@ciemat.es Davide Silvagni, José L. Velasco]


|-
 | 3
 | [[TJ-II:Excitation of zonal flow oscillations by energetic particles|Excitation of zonal flow oscillations by energetic particles]]
 | [mailto:edi.sanchez@ciemat.es Edi Sánchez]


|-
 | 4
 | [[TJ-II:Radial electric field of low-magnetic-field low-collisionality NBI plasmas|Radial electric field of low-magnetic-field low-collisionality NBI plasmas]]
 | [mailto:joseluis.velasco@ciemat.es José L. Velasco]


|-
 | 5
 | [[TJ-II:Comparison of transport of on-axis and off-axis ECH-heated plasmas|Comparison of transport of on-axis and off-axis ECH-heated plasmas]]
 | [mailto:joseluis.velasco@ciemat.es,edi.sanchez@ciemat.es José L. Velasco, Edi Sánchez]
|-

 | 6
 | [[TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport|Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-

 | 7
 | [[TJ-II:PelletFuelling|PelletFuelling]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]

|-

 | 8
 | [[TJ-II:Impurity density and potential asymmetries|Impurity density and potential asymmetries]]
 | [mailto:jose.regana@ciemat.es José M. García Regaña]

|-

 | 9
 | [[TJ-II:Investigation of turbulence spreading and information transfer in the TJ-II stellarator|Investigation of turbulence spreading and information transfer in the TJ-II stellarator]]
 | [mailto:boudewijn.vanmilligen@ciemat.es Boudewijn van Milligen]

|-

 | 10
 | [[TJ-II:Role of isotope effect on biasing induced transitions in the TJ-II stellarator|Role of isotope effect on biasing induced transitions in the TJ-II stellarator]]
 | [mailto:carlos.hidalgo@ciemat.es S. Ohshima]

|-

 | 11
 | [[TJ-II:Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J|Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J]]
 | [mailto:bing.liu@externos.ciemat.es,ulises.losada@ciemat.es Bing Liu, Ulises Losada]

|-

 | 12
 | [[TJ-II: Alfven Eigenmodes and biasing in TJ-II| Alfven Eigenmodes and biasing in TJ-II]]
 | [mailto:melnikov_07@yahoo.com A. Melnikov]

|-

 | 13
 | [[TJ-II: Potential asymmetries at low magnetic field | Potential asymmetries at low magnetic field ]]
 | [mailto:jose.regana@ciemat.es José M. García-Regaña]
|-

 | 14
 | [[TJ-II:NBI contribution to plasma fuelling|NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es Macarena Liniers]

|-

 | 15
 | [[TJ-II: Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations|Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations]]
 | [mailto:Edi.sanchez@ciemat.es Edi Sanchez]

|-

 | 16
 | [[TJ-II:Effect of ECRH on the characteristics of Alfven Eigenmodes activity|Effect of ECRH on the characteristics of Alfven Eigenmodes activity]]
 | [mailto:alvaro.cappa@ciemat.es,enrique.ascasibar@ciemat.es,francisco.castejon@ciemat.es Álvaro Cappa, Enrique Ascasíbar, Paco Castejón]

|-

 | 17
 | [[TJ-II:Investigating the Alfvén Wave damping|Investigating the Alfvén Wave damping]]
 | [mailto:francisco.castejon@ciemat.es Paco Castejón, Álvaro Cappa, Enrique Ascasíbar]

|-

 | 18
 | [[TJ-II:L-H Transition and Isotope Effect in low magnetic ripple configurations|L-H Transition and Isotope Effect in low magnetic ripple configurations]]
 | [mailto:teresa.estrada@ciemat.es,Ulises.LosadaRodriguez@ciemat.es,Carlos.Hidalgo@ciemat.es Teresa Estrada,Ulises Losada,Carlos Hidalgo]

|-

 | 19
 | [[TJ-II:Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry|Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry]]
 | [mailto:teresa.estrada@ciemat.es,javier.pinzon@ipp.mpg.de,tim.happel@ipp.mpg.de Javier Pinzon, Tim Happel,Teresa Estrada]

|-

 | 20
 | [[TJ-II:Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter|Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter]]
 | [mailto:e.delacal@ciemat.es, Eduardo de la Cal]

|-
|}

== See also ==

* [[TJ-II:Experimental program]] (current)
* [http://intranet-fusion.ciemat.es/document-server/tj-ii-experimental-program/ Experimental programs for earlier years (2002-2016)] (Intranet, password required)

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals]]

TJ-II:Experimental proposals

2018-03-20T17:14:17Z

Macarena.Liniers: /* Experimental proposals, 2018 Spring */

[[File:TJII_model.jpg|400px|thumb|right|TJ-II Model]]

== Creation of a new proposal ==

# Log in to the FusionWiki. If you don't have an account, request one by clicking 'Create account' in the left-hand menu.
# ''Type the name of your proposal page in the field below''. The required format is: 'TJ-II:Title of my proposal' (without the apostrophes). Note the 'TJ-II:' at the beginning!
# Click 'Create new proposal'. Your proposal page will be created. Edit and save (please use 'Show preview' before saving the final version).

<inputbox>
type=create
default=TJ-II:Title of my proposal
buttonlabel=Create new proposal with this title
preload=TJ-II:Proposal_template
</inputbox>

The proposal page is created on the basis of this [[TJ-II:Proposal template|Proposal template]]. You do not need to view or modify it.

== Inclusion of your proposal in the proposal list ==

* Edit the table below and add your proposal (instructions in the table).
* The link to your proposal is as follows: <nowiki>[[TJ-II:Title of your proposal|]]</nowiki> (the final character before the closing brackets <nowiki>]]</nowiki> is a vertical slash).

== Experimental proposals, 2018 Spring==
Deadline: March 7, 2018

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator|Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator]]
 | [mailto:josepmaria.fontdecaba@ciemat.es J.M. Fontdecaba]



|-
 | 2
 | [[TJ-II:Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic|Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic]]
 | [mailto:ridhimas757@gmail.com R. Sharma]

|-
 | 3
 | [[TJ-II:Validation of bootstrap predictions|Validation of bootstrap predictions]]
 | [mailto:joseluis.velasco@ciemat.es J.L.Velasco]

|-
 | 4
 | [[TJ-II:Transport analysis by means of the Transfer Entropy|Transport analysis by means of the Transfer Entropy]]
 | [mailto:boudewijn.vanmilligen@ciemat.es B.Ph. van Milligen]

|-
 | 5
 | [[TJ-II:Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas|Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es K J McCarthy]

|-
 | 6
 | [[TJ-II:Improving fuelling efficiency in TJ-II ECRH plasmas|Improving fuelling efficiency in TJ-II ECRH plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es M Calvo]

|-
 | 7
 | [[TJ-II:The influence of a core fast electron population on pellet fuelling efficiency in TJ-II|The influence of a core fast electron population on pellet fuelling efficiency in TJ-II]]
 | [mailto:nerea.panadero@externos.ciemat.es N Panadero]

|-
 | 8
 | [[TJ-II:Studies of LIquid Metal insertion in TJ-II|Studies of LIquid Metal insertion in TJ-II]]
 | [mailto:tabares@ciemat.es P.Tabares]

|-
 | 9
 | [[TJ-II:Fast Camera studies with triple bundle|Fast Camera studies with triple bundle]]
 | [mailto:e.delacal@ciemat.es E. de la Cal]

|-
 | 10
 | [[TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas|Validation of ECCD predictions in TJ-II ECRH plasmas]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 11
 | [[TJ-II:Radiation asymmetries and potential variations|Radiation asymmetries and potential variations]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 12
 | [[TJ-II:Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry|Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry]]
 | [mailto:teresa.estrada@ciemat.es Teresa Estrada]

|-
 | 13
 | [[TJ-II:Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II|Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II]]
 | [mailto:Bing.Liu@swjtu.edu.cn Bing Liu]

|-
 | 14
 | [[TJ-II:Blobs vs streamers|Blobs vs streamers]]
 | [mailto:Boudewijn.vanMilligen@ciemat.es B.Ph. van Milligen]

|-
 | 15
 | [[TJ-II:Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II|Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-
 | 16
 | [[TJ-II: Evaluation of Neoclassical transport correction terms in TJ-II|Evaluation of Neoclassical transport correction terms in TJ-II]]
 | [mailto:daniel.carralero@ciemat.es Daniel Carralero]

|-
 | 17
 | [[TJ-II:Turbulence studies during transient pellet induced regimes|Turbulence studies during transient pellet induced regimes]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran J McCarthy]

|-
|}

|-
 | 18
 | [[TJ-II:Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es M. Liniers]

|-

== Experimental proposals, 2017 Spring==
Deadline: January 26, 2017

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Search for physical mechanisms that lead to increase of turbulence following pellet injection|Search for physical mechanisms that lead to increase of turbulence following pellet injection]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]


|-
 | 2
 | [[TJ-II:Effect of pellet injection on the radial electric field profile of stellarators|Effect of pellet injection on the radial electric field profile of stellarators]]
 | [mailto:silvagnidavide1@gmail.com,joseluis.velasco@ciemat.es Davide Silvagni, José L. Velasco]


|-
 | 3
 | [[TJ-II:Excitation of zonal flow oscillations by energetic particles|Excitation of zonal flow oscillations by energetic particles]]
 | [mailto:edi.sanchez@ciemat.es Edi Sánchez]


|-
 | 4
 | [[TJ-II:Radial electric field of low-magnetic-field low-collisionality NBI plasmas|Radial electric field of low-magnetic-field low-collisionality NBI plasmas]]
 | [mailto:joseluis.velasco@ciemat.es José L. Velasco]


|-
 | 5
 | [[TJ-II:Comparison of transport of on-axis and off-axis ECH-heated plasmas|Comparison of transport of on-axis and off-axis ECH-heated plasmas]]
 | [mailto:joseluis.velasco@ciemat.es,edi.sanchez@ciemat.es José L. Velasco, Edi Sánchez]
|-

 | 6
 | [[TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport|Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-

 | 7
 | [[TJ-II:PelletFuelling|PelletFuelling]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]

|-

 | 8
 | [[TJ-II:Impurity density and potential asymmetries|Impurity density and potential asymmetries]]
 | [mailto:jose.regana@ciemat.es José M. García Regaña]

|-

 | 9
 | [[TJ-II:Investigation of turbulence spreading and information transfer in the TJ-II stellarator|Investigation of turbulence spreading and information transfer in the TJ-II stellarator]]
 | [mailto:boudewijn.vanmilligen@ciemat.es Boudewijn van Milligen]

|-

 | 10
 | [[TJ-II:Role of isotope effect on biasing induced transitions in the TJ-II stellarator|Role of isotope effect on biasing induced transitions in the TJ-II stellarator]]
 | [mailto:carlos.hidalgo@ciemat.es S. Ohshima]

|-

 | 11
 | [[TJ-II:Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J|Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J]]
 | [mailto:bing.liu@externos.ciemat.es,ulises.losada@ciemat.es Bing Liu, Ulises Losada]

|-

 | 12
 | [[TJ-II: Alfven Eigenmodes and biasing in TJ-II| Alfven Eigenmodes and biasing in TJ-II]]
 | [mailto:melnikov_07@yahoo.com A. Melnikov]

|-

 | 13
 | [[TJ-II: Potential asymmetries at low magnetic field | Potential asymmetries at low magnetic field ]]
 | [mailto:jose.regana@ciemat.es José M. García-Regaña]
|-

 | 14
 | [[TJ-II:NBI contribution to plasma fuelling|NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es Macarena Liniers]

|-

 | 15
 | [[TJ-II: Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations|Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations]]
 | [mailto:Edi.sanchez@ciemat.es Edi Sanchez]

|-

 | 16
 | [[TJ-II:Effect of ECRH on the characteristics of Alfven Eigenmodes activity|Effect of ECRH on the characteristics of Alfven Eigenmodes activity]]
 | [mailto:alvaro.cappa@ciemat.es,enrique.ascasibar@ciemat.es,francisco.castejon@ciemat.es Álvaro Cappa, Enrique Ascasíbar, Paco Castejón]

|-

 | 17
 | [[TJ-II:Investigating the Alfvén Wave damping|Investigating the Alfvén Wave damping]]
 | [mailto:francisco.castejon@ciemat.es Paco Castejón, Álvaro Cappa, Enrique Ascasíbar]

|-

 | 18
 | [[TJ-II:L-H Transition and Isotope Effect in low magnetic ripple configurations|L-H Transition and Isotope Effect in low magnetic ripple configurations]]
 | [mailto:teresa.estrada@ciemat.es,Ulises.LosadaRodriguez@ciemat.es,Carlos.Hidalgo@ciemat.es Teresa Estrada,Ulises Losada,Carlos Hidalgo]

|-

 | 19
 | [[TJ-II:Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry|Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry]]
 | [mailto:teresa.estrada@ciemat.es,javier.pinzon@ipp.mpg.de,tim.happel@ipp.mpg.de Javier Pinzon, Tim Happel,Teresa Estrada]

|-

 | 20
 | [[TJ-II:Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter|Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter]]
 | [mailto:e.delacal@ciemat.es, Eduardo de la Cal]

|-
|}

== See also ==

* [[TJ-II:Experimental program]] (current)
* [http://intranet-fusion.ciemat.es/document-server/tj-ii-experimental-program/ Experimental programs for earlier years (2002-2016)] (Intranet, password required)

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals]]

TJ-II:Experimental proposals

2018-03-20T17:12:29Z

Macarena.Liniers: /* Experimental proposals, 2018 Spring */

[[File:TJII_model.jpg|400px|thumb|right|TJ-II Model]]

== Creation of a new proposal ==

# Log in to the FusionWiki. If you don't have an account, request one by clicking 'Create account' in the left-hand menu.
# ''Type the name of your proposal page in the field below''. The required format is: 'TJ-II:Title of my proposal' (without the apostrophes). Note the 'TJ-II:' at the beginning!
# Click 'Create new proposal'. Your proposal page will be created. Edit and save (please use 'Show preview' before saving the final version).

<inputbox>
type=create
default=TJ-II:Title of my proposal
buttonlabel=Create new proposal with this title
preload=TJ-II:Proposal_template
</inputbox>

The proposal page is created on the basis of this [[TJ-II:Proposal template|Proposal template]]. You do not need to view or modify it.

== Inclusion of your proposal in the proposal list ==

* Edit the table below and add your proposal (instructions in the table).
* The link to your proposal is as follows: <nowiki>[[TJ-II:Title of your proposal|]]</nowiki> (the final character before the closing brackets <nowiki>]]</nowiki> is a vertical slash).

== Experimental proposals, 2018 Spring==
Deadline: March 7, 2018

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator|Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator]]
 | [mailto:josepmaria.fontdecaba@ciemat.es J.M. Fontdecaba]



|-
 | 2
 | [[TJ-II:Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic|Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic]]
 | [mailto:ridhimas757@gmail.com R. Sharma]

|-
 | 3
 | [[TJ-II:Validation of bootstrap predictions|Validation of bootstrap predictions]]
 | [mailto:joseluis.velasco@ciemat.es J.L.Velasco]

|-
 | 4
 | [[TJ-II:Transport analysis by means of the Transfer Entropy|Transport analysis by means of the Transfer Entropy]]
 | [mailto:boudewijn.vanmilligen@ciemat.es B.Ph. van Milligen]

|-
 | 5
 | [[TJ-II:Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas|Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es K J McCarthy]

|-
 | 6
 | [[TJ-II:Improving fuelling efficiency in TJ-II ECRH plasmas|Improving fuelling efficiency in TJ-II ECRH plasmas]]
 | [mailto:kieran.mccarthy@ciemat.es M Calvo]

|-
 | 7
 | [[TJ-II:The influence of a core fast electron population on pellet fuelling efficiency in TJ-II|The influence of a core fast electron population on pellet fuelling efficiency in TJ-II]]
 | [mailto:nerea.panadero@externos.ciemat.es N Panadero]

|-
 | 8
 | [[TJ-II:Studies of LIquid Metal insertion in TJ-II|Studies of LIquid Metal insertion in TJ-II]]
 | [mailto:tabares@ciemat.es P.Tabares]

|-
 | 9
 | [[TJ-II:Fast Camera studies with triple bundle|Fast Camera studies with triple bundle]]
 | [mailto:e.delacal@ciemat.es E. de la Cal]

|-
 | 10
 | [[TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas|Validation of ECCD predictions in TJ-II ECRH plasmas]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 11
 | [[TJ-II:Radiation asymmetries and potential variations|Radiation asymmetries and potential variations]]
 | [mailto:jose.regana@ciemat.es J. M. García-Regaña]

|-
 | 12
 | [[TJ-II:Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry|Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry]]
 | [mailto:teresa.estrada@ciemat.es Teresa Estrada]

|-
 | 13
 | [[TJ-II:Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II|Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II]]
 | [mailto:Bing.Liu@swjtu.edu.cn Bing Liu]

|-
 | 14
 | [[TJ-II:Blobs vs streamers|Blobs vs streamers]]
 | [mailto:Boudewijn.vanMilligen@ciemat.es B.Ph. van Milligen]

|-
 | 15
 | [[TJ-II:Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II|Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-
 | 16
 | [[TJ-II: Evaluation of Neoclassical transport correction terms in TJ-II|Evaluation of Neoclassical transport correction terms in TJ-II]]
 | [mailto:daniel.carralero@ciemat.es Daniel Carralero]

|-
 | 17
 | [[TJ-II:Turbulence studies during transient pellet induced regimes|Turbulence studies during transient pellet induced regimes]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran J McCarthy]

|-
|}

|-
 | 18
 | [[TJ-II:Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es M. Liniers]


== Experimental proposals, 2017 Spring==
Deadline: January 26, 2017

{| class="wikitable sortable" width="100%" border="1" cellpadding="5" cellspacing="0" style="text-align:left"
|- style="background:#FFDEAD;"
! width="10%"| '''Nr.'''
! width="60%"| '''Title'''
! width="30%"| '''Proponent(s)'''




|-
 | 1
 | [[TJ-II:Search for physical mechanisms that lead to increase of turbulence following pellet injection|Search for physical mechanisms that lead to increase of turbulence following pellet injection]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]


|-
 | 2
 | [[TJ-II:Effect of pellet injection on the radial electric field profile of stellarators|Effect of pellet injection on the radial electric field profile of stellarators]]
 | [mailto:silvagnidavide1@gmail.com,joseluis.velasco@ciemat.es Davide Silvagni, José L. Velasco]


|-
 | 3
 | [[TJ-II:Excitation of zonal flow oscillations by energetic particles|Excitation of zonal flow oscillations by energetic particles]]
 | [mailto:edi.sanchez@ciemat.es Edi Sánchez]


|-
 | 4
 | [[TJ-II:Radial electric field of low-magnetic-field low-collisionality NBI plasmas|Radial electric field of low-magnetic-field low-collisionality NBI plasmas]]
 | [mailto:joseluis.velasco@ciemat.es José L. Velasco]


|-
 | 5
 | [[TJ-II:Comparison of transport of on-axis and off-axis ECH-heated plasmas|Comparison of transport of on-axis and off-axis ECH-heated plasmas]]
 | [mailto:joseluis.velasco@ciemat.es,edi.sanchez@ciemat.es José L. Velasco, Edi Sánchez]
|-

 | 6
 | [[TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport|Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|-

 | 7
 | [[TJ-II:PelletFuelling|PelletFuelling]]
 | [mailto:kieran.mccarthy@ciemat.es Kieran McCarthy]

|-

 | 8
 | [[TJ-II:Impurity density and potential asymmetries|Impurity density and potential asymmetries]]
 | [mailto:jose.regana@ciemat.es José M. García Regaña]

|-

 | 9
 | [[TJ-II:Investigation of turbulence spreading and information transfer in the TJ-II stellarator|Investigation of turbulence spreading and information transfer in the TJ-II stellarator]]
 | [mailto:boudewijn.vanmilligen@ciemat.es Boudewijn van Milligen]

|-

 | 10
 | [[TJ-II:Role of isotope effect on biasing induced transitions in the TJ-II stellarator|Role of isotope effect on biasing induced transitions in the TJ-II stellarator]]
 | [mailto:carlos.hidalgo@ciemat.es S. Ohshima]

|-

 | 11
 | [[TJ-II:Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J|Investigation of the mechanism of decoupling between energy and particle transport channels: Proposal for joint experiments in TJ-II and H-J]]
 | [mailto:bing.liu@externos.ciemat.es,ulises.losada@ciemat.es Bing Liu, Ulises Losada]

|-

 | 12
 | [[TJ-II: Alfven Eigenmodes and biasing in TJ-II| Alfven Eigenmodes and biasing in TJ-II]]
 | [mailto:melnikov_07@yahoo.com A. Melnikov]

|-

 | 13
 | [[TJ-II: Potential asymmetries at low magnetic field | Potential asymmetries at low magnetic field ]]
 | [mailto:jose.regana@ciemat.es José M. García-Regaña]
|-

 | 14
 | [[TJ-II:NBI contribution to plasma fuelling|NBI contribution to plasma fuelling]]
 | [mailto:macarena.liniers@ciemat.es Macarena Liniers]

|-

 | 15
 | [[TJ-II: Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations|Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations]]
 | [mailto:Edi.sanchez@ciemat.es Edi Sanchez]

|-

 | 16
 | [[TJ-II:Effect of ECRH on the characteristics of Alfven Eigenmodes activity|Effect of ECRH on the characteristics of Alfven Eigenmodes activity]]
 | [mailto:alvaro.cappa@ciemat.es,enrique.ascasibar@ciemat.es,francisco.castejon@ciemat.es Álvaro Cappa, Enrique Ascasíbar, Paco Castejón]

|-

 | 17
 | [[TJ-II:Investigating the Alfvén Wave damping|Investigating the Alfvén Wave damping]]
 | [mailto:francisco.castejon@ciemat.es Paco Castejón, Álvaro Cappa, Enrique Ascasíbar]

|-

 | 18
 | [[TJ-II:L-H Transition and Isotope Effect in low magnetic ripple configurations|L-H Transition and Isotope Effect in low magnetic ripple configurations]]
 | [mailto:teresa.estrada@ciemat.es,Ulises.LosadaRodriguez@ciemat.es,Carlos.Hidalgo@ciemat.es Teresa Estrada,Ulises Losada,Carlos Hidalgo]

|-

 | 19
 | [[TJ-II:Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry|Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry]]
 | [mailto:teresa.estrada@ciemat.es,javier.pinzon@ipp.mpg.de,tim.happel@ipp.mpg.de Javier Pinzon, Tim Happel,Teresa Estrada]

|-

 | 20
 | [[TJ-II:Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter|Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter]]
 | [mailto:e.delacal@ciemat.es, Eduardo de la Cal]

|-
|}

== See also ==

* [[TJ-II:Experimental program]] (current)
* [http://intranet-fusion.ciemat.es/document-server/tj-ii-experimental-program/ Experimental programs for earlier years (2002-2016)] (Intranet, password required)

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals]]

TJ-II:Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling

2018-03-20T17:01:03Z

Macarena.Liniers: Created page with "== Experimental campaign == 2018 Spring == Proposal title == '''Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling''' == Name and affiliation of..."

== Experimental campaign ==
2018 Spring

== Proposal title ==
'''Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling'''

== Name and affiliation of proponent ==
Macarena Liniers (Laboratorio Nacional de Fusión, CIEMAT)

== Details of contact person at LNF (if applicable) ==
Macarena.liniers@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Infrared thermography of the NBI Beam Stop (BS) is a powerful tool to study the power balance of the injected beams, and their contribution to plasma fuelling.
The new IR camera FLIR X6580sc, purchased and commissioned during the previous campaign, gave preliminary results on the “shine-trough” and reionization losses through the IR images of the “Beam Stop”. A correlation between reionization losses and local pressure at the beam duct was established.
The obtained IR images did not fully correspond to the expected behaviour of the BS material, a textured graphite with easy conductivity in the plate plane. The temperatures were higher than expected, and their time traces showed a “saturation” effect. A number of tests were performed to ascertain the thermal character of this behaviour. It was confirmed that the saturation is not a camera detector effect, but a “real” evolution of the IR radiance on the camera.
In order to perform a correct analysis of the thermal images, it is necessary to study the relative importance of the different effects that contribute to the plate temperature evolution, and to the IR radiance of the plate surface in the camera wave-length range (3.5-5 m). Aside from the heat conduction in the graphite plate bulk upon beam interception:
-thermal behaviour (conduction) of the layers of Li, B, and their compounds, that are deposited on the BS graphite during Li and B evaporation, and subsequent plasma operation
-Emissivity changes of the graphite surface with temperature due to the deposited layers
-Line emission of H0, Li, B, C and their compounds, in the 3.5-5.0 m range

In order to obtain the beam fraction deposited in the plasma, a well-defined correlation between the beam power intercepted by the BS, and the measured surface temperature must be found.
A number of upgrades have been added to the IR system since the last experimental campaign:
-A new filter has been installed in the camera that will extend the measurement range up to 1500ºC. Comparison between IR images obtained with both filters will help discriminate some of the line-emission effects.
-A new lens of 12 mm focal length has been purchased to extend the field of view of the camera
-A new, larger, F2Ba window will allow a greater field of view of the camera.
The extended field of view is required to perform IR Thermography of the Target Calorimeter, and thereby characterize the beam optics. But it will also allow observation of the duct walls, where most of the re-ionized ions end their trajectories in the residual magnetic field of TJ-II.
TJ-II experimental campaign needs:
-As soon as the beams are ready (mid-May) beam pulses without B are required.
1. Spectrograms of the IR light (between 0.8-1.5 m ) coming from the BS area are necessary, to study relevant emission lines and determine their correlative lines in the 3.5-5 m range, and their intensity relative to the “background” grey body emission
2. Visible and UV spectra of light coming from the BS area, to study the species present and their contribution to radiance in the 3.5-5 m range
3. Capture IR images of the BS with increased frequency to study the Temperature rise and fall and compare with the time scales of the IR emission effects (grey body, line emission)
4. Perform beam power scans to study the correlation between BS temperature and Beam power
5. Perform a number of pulses with B to estimate the re-ionization losses
-Towards the end of the campaign:
6. Beam pulses on the Beam Calorimeter with the new 12 mm lens

== If applicable, International or National funding project or entity ==
Proyecto Plan Nacional: FIS2017-89326-R

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: 2 days of operation + 2 beam pulses to be used for reference in several experiments
* Essential diagnostic systems:: IR spectroscopy, VUV spectroscopy plasma density, NPA (tangential), IR Thermography, Fast Ion gauges, Halpha
* Type of plasmas (heating configuration):several different densities
* Specific requirements on wall conditioning if any:reference pulses one day previous to Li, one day next to Li
* External users: need a local computer account for data access: yes/no
* Any external equipment to be integrated? Provide description and integration needs:

== Preferred dates and degree of flexibility ==
Preferred dates: 22-05-2018 and 27-06-2018

== References ==
<references /> 

<hr>
[[TJ-II:Experimental proposals|Back to list of experimental proposals]]

[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals]]

TJ-II:Neutral Beam Injection

2017-08-04T11:18:30Z

Macarena.Liniers:

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>
<ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref>

=== Power and particle balance ===
In the analysis of the confinement and transport properties of NBI heated plasmas, a proper evaluation of the power and particle balance is necessary. In order to achieve that, a number of experimental studies have been carried out to determine the beam power transmission and beam contribution to plasma fuelling.
<ref>M. Liniers, G. Wolfers, et al., ''Beamline duct monitoring of the TJ-II Neutral Beam Injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013) 960-963]]</ref>
<ref>M. Liniers, J. Damba, et al., ''Beam transmission dependence on beam parameters for TJ-II Neutral Beam Injectors '', [[doi:10.1016/j.fusengdes.2017.05.104|Fusion Engineering and Design (2017) ]]</ref>

==References==

<references />

TJ-II:Neutral Beam Injection

2017-08-04T11:05:03Z

Macarena.Liniers: /* Calorimeter */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>
<ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref>

=== Power and particle balance ===
In the analysis of the confinement and transport properties of NBI heated plasmas, a proper evaluation of the power and particle balance is necessary. In order to achieve that, a number of experimental studies have been carried out to determine the beam power transmission and beam contribution to plasma fuelling.
<ref>M. Liniers, G. Wolfers, et al., ''Beamline duct monitoring of the TJ-II Neutral Beam Injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''' (2013) 960-963]]</ref>
<ref>M. Liniers, J. Damba, et al., ''Beam transmission dependence on beam parameters for TJ-II Neutral Beam Injectors '', [[doi:10.1016/j.fusengdes.2017.05.104|Fusion Engineering and Design (2017) ]]</ref>

==References==

<references />

TJ-II:Neutral Beam Injection

2017-08-04T09:35:48Z

Macarena.Liniers: /* References */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>
<ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref>

==References==

14. M. Liniers, Gilles Wolfers, et al., ''Beamline duct monitoring of the TJ-II Neutral Beam Injectors", Fusion Engineering and Design 88 (2013) 960–963 <doi:<http://dx.doi.org/10.1016/j:fusengdes.2013.04.014>

TJ-II:Neutral Beam Injection

2017-08-04T09:31:59Z

Macarena.Liniers: /* References */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>
<ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref>

==References==

<references />

TJ-II:Neutral Beam Injection

2017-08-04T09:31:12Z

Macarena.Liniers: /* References */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>
<ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref>

==References==

<references />
14.[[<M. Liniers, Gilles Wolfers, et al., ''"Beamline duct monitoring of the TJ-II Neutral Beam Injectors",'' Fusion Engineering and Design '''88''' (2013) 960–963 >|<doi:<http://dx.doi.org/10.1016/j:fusengdes.2013.04.014>]]

TJ-II:Neutral Beam Injection

2017-08-04T09:30:16Z

Macarena.Liniers: /* References */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>
<ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref>

==References==

<references />
14.[[<M. Liniers, Gilles Wolfers, et al., ''"Beamline duct monitoring of the TJ-II Neutral Beam Injectors",'' Fusion Engineering and Design '''88''' (2013) 960–963 >|<doi:<http://dx.doi.org/10.1016/j:fusengdes.2013.04.014>]]

TJ-II:Neutral Beam Injection

2017-08-04T09:25:16Z

Macarena.Liniers: /* References */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>
<ref>[[Media:Master_thesis_julius_damba.pdf|J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)]]</ref>

==References==

<references />
[[doi:<http://dx.doi.org/10.1016/j:fusengdes.2013.04.014>|<M. Liniers, Gilles Wolfers, et al., ''"Beamline duct monitoring of the TJ-II Neutral Beam Injectors",'' Fusion Engineering and Design '''88''' (2013) 960–963 >]]

TJ-II:Neutral Beam Injection

2014-08-22T13:57:34Z

Macarena.Liniers: /* References */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>

[[Media:http://wiki.fusenet.eu/fusionwiki/images/6/61/Master_thesis_julius_damba.pdf]]==References==
<references />
13. J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)

TJ-II:Neutral Beam Injection

2014-08-22T13:50:29Z

Macarena.Liniers: /* References */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>

==References==
<references />
13. J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)

TJ-II:Neutral Beam Injection

2014-08-22T13:49:46Z

Macarena.Liniers: /* References */

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>

==References==
<references />
13. J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)

TJ-II:Neutral Beam Injection

2014-08-22T13:49:10Z

Macarena.Liniers: /* References */ New reference added

[[TJ-II]] disposes of two neutral beam injectors (NBI), each of
which can produce ≤ 300 ms pulses of neutral hydrogen
accelerated to 40 keV, to provide up to 1.2 MW of absorbed
additional heating for central electron densities up to 1.6×1020
m-3.
<ref>J. Guasp, M. Liniers, ''Theoretical evaluations of Neutral beam Injection efficiency for the TJ-II helical-axis stellarator'', [http://www.ans.org/store/j_30199 Fusion technology '''24''', 3, 251 (1993)]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part I: properties without a radial electric field'', [[doi:10.1088/0029-5515/40/3/309|Nucl. Fusion '''40''' (2000) 397-409]]</ref>
<ref>J. Guasp, M. Liniers, ''Loss cone structure for ions in the TJ-II helical axis stellarator. Part II: radial electric field effects'', [[doi:10.1088/0029-5515/40/3/310|Nucl. Fusion '''40''' (2000) 411-427]]</ref>
<ref>J. Guasp, M. Liniers, C. Fuentes, and G. Barrera, ''Thermal load calculations at TJ-II vacuum vessel under NBI,'' [http://www.new.ans.org/store/j_75 Fusion Tech., '''35''', pp. 32-41 (1999)]</ref>
<ref>C. Fuentes et al, ''Neutral beam injection optimization at TJ-II'', [[doi:10.1016/j.fusengdes.2005.06.315|Fusion Engineering and Design '''74''', Issues 1-4 (2005) 249-253]]</ref>
<ref>M. Liniers, G. Wolfers,J.A. Sebastián, et al, ''Beamline duct monitoring of the TJ-II neutral beam injectors'', [[doi:10.1016/j.fusengdes.2013.04.014|Fusion Engineering and Design '''88''', Issues 6-8 (2013), 960–963]]</ref>

NBI1 is located in [[TJ-II:Sectors|sector]] D8.
NBI2 is located in [[TJ-II:Sectors|sector]] C1.

{| border="0"
|- valign="top"
| [[File:NBI 1y2.jpg|400px|thumb|TJ-II vacuum vessel and the two NBI injectors. Left: NBI1; right: NBI2]]
| [[File:TJ-II_NBI.png|400px|thumb|Diagram of an NBI injector, coupled to TJ-II]]
|-
|}

=== Power supply ===

The two high voltage power supplies feeding the acceleration grids of the injectors are of the transformer–rectifier type, taking their primary energy from a pulsed [[TJ-II:Power supply|flywheel generator]], and are coupled to the acceleration grids through a switching device.
<ref>J. Alonso et al, ''High voltage power supplies for the neutral beam injectors of the stellarator TJ-II'', [[doi:10.1016/S0920-3796(01)00389-1|Fusion Engineering and Design '''56-57''' (2001) 693-697]]</ref>

=== Control system ===
The NBI system has its own control system, based on [[:Wikipedia:VMEbus|VMEbus]], with controller boards running the [[:Wikipedia:OS9|OS9]] real-time operating system.
<ref>L. Martínez-Laso et al, ''TJ-II neutral beam injectors control and data acquisition system'', [[doi:10.1016/S0920-3796(01)00349-0|Fusion Engineering and Design '''56-57''' (2001) 477-480]]</ref>
<ref>R. Carrasco et al, ''The NBI control system for the TJ-II'', [[doi:10.1016/j.fusengdes.2006.04.014|Fusion Engineering and Design '''81''', Issues 15-17 (2006) 1813-1816]]</ref>

=== Vacuum system ===
In order to keep reionization losses at an acceptable level, the maximum allowed pressure during the beam pulse is 10−4 mbar, which requires an installed pumping speed of 350,000 l/s. Titanium getter pumps have been chosen as the primary vacuum system for these injectors. Base pressures in the range of 5 × 10−9 mbar are attainable with titanium pump operation.
<ref>M. Liniers et al, ''Vacuum system of the neutral beam injectors at the stellarator TJ-II'', [[doi:10.1016/S0042-207X(02)00208-7|Vacuum '''67''', Issues 3-4 (2002) 379-384]]</ref>

=== Calorimeter ===

[[File:TJ-II NBI Calorimeter.jpg|400px|thumb|right|The target calorimeter (red) in its operating position. Only part of the vacuum vessel is shown. The neutral beam is injected from the right. The infrared (IR) camera (below) views the calorimeter via a mirror]]
A carbon fiber composite (CFC) target calorimeter has been installed to study the power density distribution of the neutral beams in situ. The thermographic print of the beam can be recorded using an infrared camera, permitting a reliable analysis due to the highly anisotropic thermal conductivity of the target material. Direct conversion from temperature to power density is possible due to independent thermocouple measurements on two adiabatically mounted copper buttons. With the combined thermographic and calorimetric measurements it has been possible to determine the power density distribution of the beams.
<ref>C. Fuentes et al, ''Thermographic calorimetry of the neutral beam injectors heating beams at TJ-II'', [http://link.aip.org/link/?RSINAK/77/10E519/1 Rev. Sci. Instrum. '''77''' (2006) 10E519]</ref>
<ref>C. Fuentes et al, ''Power transmission of the neutral beam heating beams at TJ-II'', [[doi:10.1016/j.fusengdes.2007.07.054|Fusion Engineering and Design '''82''', Issues 5-14 (2007) 926-932]]</ref>

==References==
<references />
13. J. Damba, ''Beam Transmission Monitoring of the TJ-II Neutral Beam Injectors'', European Master of Science in Nuclear Fusion Physics and Engineering (Erasmus Mundus Programme, 2014)

File:Master thesis julius damba.pdf

2014-08-22T13:36:39Z

Macarena.Liniers: "Beam Transmission monitoring of the TJ-II Neutral Beam Injectors", European Master of Science in Nuclear Fusion Physics and Engineering /Erasmus Mundus programme)

"Beam Transmission monitoring of the TJ-II Neutral Beam Injectors", European Master of Science in Nuclear Fusion Physics and Engineering /Erasmus Mundus programme)