FusionWiki - User contributions [en]

TJ-II:Re-commissioning of Fast Ion Loss Detector

2019-01-29T13:06:17Z

BelenLMiranda: Created page with "== Experimental campaign == 2019 Spring == Proposal title == '''Re-commissioning of Fast Ion Loss Detector ''' == Name and affiliation of proponent == A. Baciero1, B. Lópe..."

== Experimental campaign ==
2019 Spring

== Proposal title ==
'''Re-commissioning of Fast Ion Loss Detector '''

== Name and affiliation of proponent ==
A. Baciero1, B. López-Miranda1, K.J. McCarthy1, D. Jiménez-Rey1, M. Martínez2, M. Ochando1, F. Medina1, I. Pastor1 and TS and TJ-II team.

(1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain)

(2 Laboratorio de Fotofísica del Instituto de Ciencias Aplicadas y Tecnología (ICAT), UNAM, México)

== Details of contact person at LNF ==
A. Baciero: a.baciero@ciemat.es
== Description of the activity ==
Motivation.

The study of suprathermal ion production and fast ion losses are key problems in the develop of future fusion reactors, since these particles produce serious damage, contribute to the reduction of the heating efficiency and their production mechanisms are in some cases unknown. Previously, we have installed a fast ion loss detector (FILD) based on luminescent light induced on phosphor screens [1-4]

Proposal.

Within the present proposal, we plan to recommissioning the FILD at TJ-II which was removed from its observation window in order to repair the Mirnov coils in the previous experimental campaign. We plan to study the behaviour of fast ion losses in ECRH and NBI plasmas. The energy distribution of this population will be determined from the luminescent signal [3].

== International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:

• Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the FILD system and another day to perform the experiment.

• Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution. We need to compare the high energy ions collected by the CNPA

• Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64)

• Specific requirements on wall conditioning if any: We need discharges with NBI, ECRH and good control with stationary density along discharges. Good Thomson scattering plasma profiles are required.

• External users: need a local computer account for data access: No.

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-05-2019)
We would like to perform the experiment during May 2019, when the NBI system works properly.


== References ==
<references />
[1] C. Burgos, B. Zurro et al., Rev. Sci. Instrum. 74, 1861 (2003).
<references />
[2] D. Jiménez-Rey, B. Zurro, G. García, et al, Journal of Applied Physics, 104, 064911 (2008); https://doi.org/10.1063/1.2979327
<references />
[3] M. Martínez, B. Zurro, A. Baciero, D. Jiménez-Rey and V. Tribaldos, Plasma Phys. Control. Fusion 60, 025024 (2018).
<references />
[4] M. Martínez, B. Zurro, A. Baciero, et al., Contrib. to Plasma Phys.58 861-869 (2018)

<hr>
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[[Category:TJ-II internal documents]]
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TJ-II:Routine and systematic use of the LIBS

2019-01-29T12:57:29Z

BelenLMiranda: Created page with "== Experimental campaign == 2019 Spring == Proposal title == '''Routine and systematic use of the Laser Induced Blow-off Spectroscopy technique to follow the evolution of th..."

== Experimental campaign ==
2019 Spring

== Proposal title ==
'''Routine and systematic use of the Laser Induced Blow-off Spectroscopy technique to follow the evolution of the hydrogen composition in the wall of the TJ-II stellarator and monitoring its contribution to the total impurities of the plasma using optical emission spectroscopy'''

== Name and affiliation of proponent ==
B. López-Miranda1, A. Baciero1, K. J. McCarthy1, M. Ochando1, F. Medina1, I. Pastor1 and TS and TJ-II team.

(1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain)

== Details of contact person at LNF ==
B. López-Miranda: belen.lopez@ciemat.es
== Description of the activity ==
Motivation.

Laser induced breakdown spectroscopy (LIBS) is a promising method for remote in-situ monitoring of erosion/deposition processes and retention of plasma fuel (D, T) on the first walls of fusion devices [1, 2]. Previously, several LIBS systems [3-6] have been developed for use outside the main chamber of magnetic fusion devices, where complementary and sophisticated surface analysis technique can be used. However, LIBS has rarely been performed in-situ; partially due to the difficulty of access and partially due to difficulties of analysis, i.e. how to obtain quantitative information on the deposited layers on the wall of the device. In [2] we developed a in-situ system to investigate the behavior of the hydrogenic composition of the TJ-II wall chamber.

Proposal.

Within the present proposal, we plan to perform LIBS daily in-situ in the TJ-II device, with the purpose of probing the wall composition each time significant changes are performed in experimental conditions, e.g. boronization, lithiumization, Electron Cyclotron Resonance Heating (ECRH), versus Neutral Beam Injection heating (NBI), changes in gas fueling, or changes in wall structures (insertion of probes and limiters, etc.). We study the simultaneous evolution of impurities with a dual spectrometer in order to determine the contribution of the wall composition to the whole impurity content of the TJ-II plasmas.

== International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.
== Description of required resources ==
Required resources:

• Number of plasma discharges or days of operation: We do not need specific operational days, rather every day we need some time previous to the beginning of machine operation in order to perform the experiment with the proper security requirements. We do not need triggers or plasma, we only need to manually operate the laser safely.

• Essential diagnostic systems: Nd-YAG laser and a dual visible spectrometer.

• Type of plasmas (heating configuration): We need changes in experimental conditions in order to determine its influence on the wall composition and its contribution to the impurity rate. It would be of interest to perform LIBS experiments with deuterium plasmas.

• Specific requirements on wall conditioning if any: No, but we will try to compare the wall composition with and without lithium and boron treatments.

• External users: need a local computer account for data access: No.

== Preferred dates and degree of flexibility ==
Preferred dates: ()
We would like to perform the experiment in the early morning.


== References ==
<references />
1. V. Philipps et al., Development of laser-based techniques for in situ characterization of the first wall in ITER and future fusion devices Nucl. Fusion 53, 093002 (2013).
<references />
2. B. López-Miranda, B. Zurro, A. Baciero, Rev. Sci. Instrum., 87, 11 D811 (2016); https://doi.org/10.1063/1.4959569
<references />
3. L. Mercadier et al., In situ tritium measurements and control by laser techniques, Fusion Sci. Tech. 60, 1049-1052 (2011).
<references />
4. P. Paris et al., Development of laser induced breakdown spectroscopy for studying erosion, deposition, and fuel retention in ASDEX Upgrade, Fusion Eng. Des. 98-99, 1349-1352 (2015).
<references />
5. G.S. Maurya et al., Proof-of-concept experiment for on-line laser induced breakdown spectroscopy analysis of impurity layer deposited on optical window and other plasma facing components of Aditya tokamak, Rev. Sci. Instrum. 86, 123112 (2015).
<references />
6. G.S. Maurya et al., Analysis of deposited impurity material on the surface of the optical window of the Tokamak using LIBS, Phys. Scr. 89 (2014) 075601 (2014).

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

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

TJ-II:Comparison of the ionic effective charge of TJ-II plasmas after recent vacuum wall boronization/lithiumization with Laser Blow-off contaminated plasmas using visible bremsstrahlung emissions

2019-01-29T12:49:10Z

BelenLMiranda: Created page with "== Experimental campaign == 2019 Spring == Proposal title == '''Comparison of the ionic effective charge of TJ-II plasmas after recent vacuum wall boronization/lithiumization..."

== Experimental campaign ==
2019 Spring
== Proposal title ==
'''Comparison of the ionic effective charge of TJ-II plasmas after recent vacuum wall boronization/lithiumization with Laser Blow-off contaminated plasmas using visible bremsstrahlung emissions'''

== Name and affiliation of proponent ==
B. López-Miranda1, A. Baciero1, K.J. McCarthy1, M. Ochando1, F. Medina1, I. Pastor1 and TS and TJ-II Team.
(1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.)

== Details of contact person at LNF ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity ==
Motivation.

Study of the impurity behavior in fusion plasmas is crucial for the performance and understanding its transport is needed to achieve fusion research goals. Effective ion charge, Zeff, is one of basic plasma parameters for estimating impurity content in high-temperature plasmas and its profile measurement is essential for studying impurity transport in the plasma core. Whereas in tokamak plasmas several methods are available to estimate the plasma Zeff [1], in stellarator devices, with not significant current, only bremsstrahlung measurements in visible and soft X-ray ranges can be used for this purpose. Previous attempts for measuring the Zeff profiles in TJ-II plasmas by means of visible bremsstrahlung (VB) profiles [2, 3, 4] provided unrealistic Zeff values much higher than those estimated by soft X-rays measurements. Accurate deduction of Zeff is possible with an absolutely calibrated measurement of the emissivity and electron density and temperature in a wavelength region where e–i bremsstrahlung is the dominant source of light. Identification of wavelength regions free of atomic lines and other radiation is a challenge because there are different contributions to the continuum spectrum.

Proposal.

In this work, we propose to study the emission from bremsstrahlung in relatively high-temperature fusion research plasmas and measure the Zeff profile by scanning the visible bremsstrahlung in broad spectral ranges, upgrading the previous system described in [4] by means of a plan achromatic doublet and reducing the scanning mirror velocity in order to maximize the signal and avoid the optical aberrations. We try to compare the experimental results obtained with freshly boronizated/lithiumizated plasmas with the Zeff profiles measured with the introduction of impurities. In order to perform the second part of the experiment, we will inject impurities in the vacuum vessel by means of laser blow-off.

== International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:

• Number of plasma discharges or days of operation: We would need at least 3 operational days: one (compatible with other experiments) to adjust all the variables of the rotational scanning mirror system, another day to perform the experiment with freshly boronization/lithiumization. We will devote the third day to perform the second part of the experiment which requires the injection of impurities by means of laser blow-off ablation.

• Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution. We need the electron density and temperature measurements from Thomson scattering.
Laser blow-off system and a broad range PMA12 spectrometer.

• Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64)

• Specific requirements on wall conditioning if any: we need freshly lithiumizated and boronizated plasmas. We prefer to perform the experiment after 2 wall conditioning treatments at least.

• We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we need plasma electron densities that are sufficiently high to ensure good Thomson scattering profiles.

• External users: need a local computer account for data access: No.

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03/4-2019)
We would like to perform the experiment during March and April 2019.


== References ==
<references />
1. Zheng YZ et al., 2007 CHINESE PHYSICS 16 (4): 1084-1088
<references />
2. Baciero A, Zurro B et al., Proc. 30th EPS Conf., St. Petersburg, 7-11 July 2003 ECA Vol. 27A, P-2.80.
<references />
3. Baciero A, Zurro B et al, Proc. 34th EPS Conf., Warsaw, July, 2007 ECA Vol.31F, P-5.089.
<references />
4. B. López Miranda, A. Baciero, B. Zurro, et al., Proc. 43rd EPS Conf., Leuven, Belgium, July, 2016 Vol. 40A ISBN: 2-914771-99-1.

<hr>
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[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals Spring 2019]]

TJ-II:Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II

2018-03-07T07:31:57Z

BelenLMiranda: Created page with "== Experimental campaign == 2018 Spring == Proposal title == '''Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser b..."

== Experimental campaign ==
2018 Spring

== Proposal title ==
'''Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II'''

== Name and affiliation of proponent ==
B. López-Miranda (LNF, CIEMAT, Spain), B. Zurro (LNF, CIEMAT, Spain), A. Baciero (LNF, CIEMAT, Spain), E.M. Hollmann (University of California, San Diego, La Jolla, CA, USA), M. Ochando, (LNF, CIEMAT, Spain), F. Medina (LNF, CIEMAT, Spain), K. McCarthy (LNF, CIEMAT, Spain), I. Pastor (LNF, CIEMAT, Spain), G. Rattá (LNF, CIEMAT, Spain) and TJ-II team (LNF, CIEMAT, Spain).

== Details of contact person at LNF (if applicable) ==
A. Baciero (alfonso.baciero@ciemat.es)

B. López-Miranda (belen.lopez@ciemat.es)

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
In stellarators and tokamaks, achieving impurity control that is compatible with long energy confinement times is of paramount importance for relevant magnetically confined nuclear fusion plasmas. The confinement and transport properties of light and heavy impurity particles have been studied with spatial resolution in the stellarator TJ-II as a function of electron density, working gas (H/D) as well as charge and mass of the injected ions <ref>Zurro B et al., Plasma Phys. Control. Fusion 56 (2014) 124007 </ref> <ref>López-Miranda B et al., 44rd EPS Conference on plasma Physics P5.166 (2017) </ref>. At present, there are indications that the ECRH power level influences significantly impurity confinement as a consequence of confinement degradation with injected power. Moreover, the influence of ECRH power level and deposition radius is critical to understand its role on impurity mitigation effect <ref>López-Miranda B et al., 45rd EPS Conference on plasma Physics (2018) </ref>.
The goal of the present study is to investigate the behaviour of transport mechanisms operating at different plasma radii and distinct levels of heating power for light and heavy impurities. For these purposes, relaxation decay times will be determined for different power deposition levels and for different radius of power deposition.
Within the present proposal, we plan to inject impurities into TJ-II ECRH plasmas by means of laser blow-off. We intend to study the influence of ECRH power level and its deposition at different radii. In order to obtain stable target plasmas, we will need low-electron density plasmas that are in turn sufficiently high to ensure good Thomson scattering profiles.

== If applicable, International or National funding project or entity ==
This work is partially funded by Grant No. ENE2014-56517-R from the “Ministerio de Economía y Competitividad” and by the US Department of Energy under DE-FG02-07ER54917. B.L.M. receives a scholarship, BES-2015-075704.

== Description of required resources ==
'''Days''': We request three or more operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system plus two to perform the power heating level scan and the power deposition radius scan and to complete the experiment with various kinds of impurities.

'''Diagnostics''': Standard TJ-II diagnostics: Main radiation diagnostics (X-ray diagnostics, bolometers, VUV-spectrometer, Thomson scattering, etc.) plus the laser blow-off system <ref>Zurro B et al., Nucl. Fusion 51 (2014) 063015</ref>. A PMT detector, compatible with the experiment, will be located at the focal plane of a visible spectrometer. Finally, a low spectral resolution PMA spectrometer will be used to acquire the spectra between 200 to 700 nm.

'''Magnetic configurations and experimental set-up''':
The 100_40_44 magnetic configuration offers a good plasma view.
ECRH power focus at different radius (on/off axis).
ECRH scan at 3 different power levels (500, 250, 100 kW).

== Preferred dates and degree of flexibility ==
We would like to perform the experiments during the last weeks of June 2018, since the experiments will be made in collaboration with Dr. Eric M. Hollmann of UCSD.

== References ==
<references /> 

<hr>
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[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals]]

TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport

2017-01-23T14:38:20Z

BelenLMiranda: /* Description of required resources */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least three operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and two days to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64) with ECRH heating.
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.

2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport

2017-01-23T14:36:40Z

BelenLMiranda: /* Description of required resources */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least three operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and two days to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.

2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

<hr>
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[[Category:TJ-II internal documents]]
[[Category:TJ-II experimental proposals]]

TJ-II:Experimental proposals

2017-01-23T09:01:33Z

BelenLMiranda: /* Experimental proposals, 2017 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'. 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
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 my proposal|]]</nowiki> (the final character before the closing brackets <nowiki>]]</nowiki> is a vertical slash).

== 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)

== 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,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]]
 | [mailto:belen.lopez@ciemat.es Belén López-Miranda]

|}

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

TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport

2017-01-23T08:55:54Z

BelenLMiranda: /* Description of required resources */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.

2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport

2017-01-23T08:55:20Z

BelenLMiranda: /* Name and affiliation of proponent */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:48:43Z

BelenLMiranda: /* Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages) */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation.
In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal.
Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.

2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:47:53Z

BelenLMiranda: /* Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages) */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation.
In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal.
Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.

2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:46:40Z

BelenLMiranda: /* Description of required resources */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.

2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:46:16Z

BelenLMiranda: /* Name and affiliation of proponent */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:45:49Z

BelenLMiranda: /* Name and affiliation of proponent */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda 1, B. Zurro 1, M. Martínez 1, E. Hollmann 2, A. Baciero 1, M. Ochando 1, F. Medina 1, K.J. McCarthy 1 and TS and TJ-II Team.//

1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.

2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:43:26Z

BelenLMiranda: /* Description of required resources */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda1, B. Zurro1, M. Martínez1, E. Hollmann2, A. Baciero1, M. Ochando1, F. Medina1, K.J. McCarthy1 and TS and TJ-II Team.//
1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.
2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:41:29Z

BelenLMiranda: /* Description of required resources */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda1, B. Zurro1, M. Martínez1, E. Hollmann2, A. Baciero1, M. Ochando1, F. Medina1, K.J. McCarthy1 and TS and TJ-II Team.//
1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.
2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges with at least three levels of ECRH power. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:40:28Z

BelenLMiranda: /* Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages) */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda1, B. Zurro1, M. Martínez1, E. Hollmann2, A. Baciero1, M. Ochando1, F. Medina1, K.J. McCarthy1 and TS and TJ-II Team.//
1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.
2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems:Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration):We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges with at least three levels of ECRH power. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:38:55Z

BelenLMiranda: /* References */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda1, B. Zurro1, M. Martínez1, E. Hollmann2, A. Baciero1, M. Ochando1, F. Medina1, K.J. McCarthy1 and TS and TJ-II Team.//
1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.
2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behavior of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II by laser blow-off. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems:Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration):We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges with at least three levels of ECRH power. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== References ==
<references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp).

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

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

TJ-II:Proposal template

2017-01-23T08:37:29Z

BelenLMiranda: /* Preferred dates and degree of flexibility */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda1, B. Zurro1, M. Martínez1, E. Hollmann2, A. Baciero1, M. Ochando1, F. Medina1, K.J. McCarthy1 and TS and TJ-II Team.//
1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.
2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behavior of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II by laser blow-off. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems:Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration):We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges with at least three levels of ECRH power. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== Preferred dates and degree of flexibility ==
Preferred dates: (XX-03-2017)
We would like to perform the experiment during March 2017.

== 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:Proposal template

2017-01-23T08:36:31Z

BelenLMiranda: /* Description of required resources */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
B. López-Miranda1, B. Zurro1, M. Martínez1, E. Hollmann2, A. Baciero1, M. Ochando1, F. Medina1, K.J. McCarthy1 and TS and TJ-II Team.//
1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.
2 University of California, San Diego, La Jolla, CA, USA.

== Details of contact person at LNF (if applicable) ==
B. López-Miranda: belen.lopez@ciemat.es

== Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behavior of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.

Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II by laser blow-off. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.

== If applicable, International or National funding project or entity ==
This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.

== Description of required resources ==
Required resources:
* Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment.
* Essential diagnostic systems:Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution.
* Type of plasmas (heating configuration):We need standard configuration plasmas (100_44_64).
* Specific requirements on wall conditioning if any:
1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
2. We need discharges with solely ECRH and good control with constant density along discharges with at least three levels of ECRH power. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.

* External users: need a local computer account for data access: N
* Any external equipment to be integrated? Provide description and integration needs: N

== 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]]

TJ-II:Proposal template

2017-01-23T08:28:16Z

BelenLMiranda: /* If applicable, International or National funding project or entity */

TJ-II:Proposal template

2017-01-23T08:27:19Z

BelenLMiranda: /* Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages) */

TJ-II:Proposal template

2017-01-23T08:25:43Z

BelenLMiranda: /* Details of contact person at LNF (if applicable) */

TJ-II:Proposal template

2017-01-23T08:23:19Z

BelenLMiranda: /* Name and affiliation of proponent */

TJ-II:Proposal template

2017-01-23T08:21:41Z

BelenLMiranda: /* Proposal title */

== Experimental campaign ==
2017 Spring

== Proposal title ==
'''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport'''

== Name and affiliation of proponent ==
Enter name and affiliation here

== 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)==
Enter description here <ref>A. Einstein, Journal of Exceptional Results (2017)</ref>

== If applicable, International or National funding project or entity ==
Enter funding here or N/A

== 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:

== 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]]