TJ-II:Experimental proposals

TJ-II Model

Creation of a new proposal

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2. 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!
3. Click 'Create new proposal'. Your proposal page will be created. Edit and save (please use 'Show preview' before saving the final version).

Your proposal will automatically be included in the lists below (provided you don't delete the relevant lines at the end of your proposal). You may need to reload this page to update the lists.

Experimental proposals, Spring 2022

Deadline: January 24, 2022

1. TJ-II: Influence of magnetic configuration on filament dynamics
2. TJ-II:Turbulence properties near a rational surface
3. TJ-II: Zeff measurement using visible bremsstrahlung (VB) with NBI heating (II)
4. TJ-II:Impurity transport studies by LILA-TOF detection. A Lithium Laser-Ablation based Time-of-Flight (LILA-TOF) diagnostic for measuring plasma edge ion temperature (II). Influence of toroidal plasma rotation
5. TJ-II: Multipellet injection in NBI plasmas
6. TJ-II: Impurity injection by laser blow-off (LBO): Confinement and transport studies of high Z impurity injection by LBO in ion-root scenarios (II). Comparison to neoclassical and turbulence simulations.
7. TJ-II: On the search of Zonal Flows and the influence of Alfvén Eigenmodes in the TJ-II stellarator
8. TJ-II:L-H transition studies: characterization of plasma turbulence using Gas Puff Imaging, Probes, Doppler reflectometry and HIBP diagnostics
9. TJ-II: Spectroscopic studies of TESPEL-shell ablation clouds
10. TJ-II: Studies of pellet plasmoid drift in different magnetic configurations
11. TJ-II: SOL Temperature profiles using RFA role of edge radial electric fields
12. TJ-II: Determination of the spatial periodicity of NBI-driven Alfvén Eigenmodes and study of its magnetic configuration dependence
13. TJ-II:NBI1 vs. NBI2 heated plasma comparison
14. TJ-II:Turbulence and flow measured at the 3/2 magnetic island using Doppler reflectometry
15. TJ-II: Validation of neutral beam current drive
16. TJ-II: impact of impurities on turbulence
17. TJ-II: Combining retarding-field energy analyzer and electrostatic probes measurements, an approach to measure the phase relation between density and temperature fluctuations using RFA?
18. TJ-II:Imaging of pelet cloud dynamics in TJ-II using Halpha and bremsstraahlung filters and a fast-frame camera
19. TJ-II:Searching for AEs suppression scenarios using off-axis ECCD
20. TJ-II: Influence of edge radial electric fields on impurity transport
21. TJ-II: 2D mapping of plasma parameters using HIBP
22. TJ-II: Measurements using Gas Puff Imaging system
23. TJ-II: On the electrostatic transport driven by Alfvén modes and broadband turbulence in the plasma edge region of the TJ-II stellarator
24. TJ-II: Calibration of the helical arrays of Mirnov coils
25. TJ-II: Injection of TESPELs with compounds or multiple elements of interest for W7-X

Preliminary session allocation ( Jan 26, pending approval by the TJ-II external committee).

Experimental proposals, Autumn 2021

Deadline: October 1, 2021

1. TJ-II: On the physics of the density limit
2. TJ-II: Pellet induced Enhanced Confinement: the role of Er and turbulence
3. TJ-II: Evolution of LCR by HIBP and Probes
4. TJ-II:Impurity transport studies by LILA-TOF detection. A Lithium Laser-Ablation based Time-of-Flight (LILA-TOF) diagnostic for measuring plasma edge ion temperature and toroidal plasma rotation
5. TJ-II: Impurity injection by laser blow-off (LBO): Confinement and transport studies of high Z impurity injection by LBO in ion-root regime discharges
6. TJ-II: Zeff measurement using visible bremsstrahlung emissions with NBI heating
7. TJ-II: Turbulent ExB transport studies using HIBP and edge probes

Experimental proposals, Spring 2021

Deadline: January 30, 2021

1. TJ-II: Biasing experiments in TJ-II: Feed back control of Zonal Flows and cross-phase effects on turbulent transport
2. TJ-II: Commissioning of new Gas Puff Imaging system
3. TJ-II: Commissioning of the new helical arrays of magnetic coils
4. TJ-II: Edge – SOL coupling studies using fast cameras and Langmuir probes: role of edge turbulence and radial electric fields
5. TJ-II: Fast particles induced transport: ExB transport and asymmetries
6. TJ-II: Influence of Alfven Eigenmodes in edge turbulence and Zonal Flows
7. TJ-II: Infuence of AEs on ExB transport: role of phase shift effects
8. TJ-II: Magnetic fluctuations induced by pellet injections in TJ-II
9. TJ-II: Studies of the dynamics of injected hydrogen pellets in the stellarator TJ-II
10. TJ-II: Two dimensional distribution of plasma potential and density
11. TJ-II: Perpendicular plasma flow asymmetries in different iota magnetic configurations measured by Doppler reflectometry

Resolution of the experimental proposals Autumn 2019 and Feb_2020

TJII_Access_Committee_February_2021_v1.pdf

Experimental proposals, Spring 2020

Deadline: January 23, 2020

1. TJ-II: Filter spectroscopy for pellet ablation cloud in TJ-II NBI plasmas
2. TJ-II: Density limit and ZFs in TJ-II
3. TJ-II: Comparison of Beam-wall effects at the beam ducts of NBI
4. TJ-II:Real Time Lithiation-boronization in TJ-II
5. TJ-II:LIA-TOF. New method for Edge Ti determination in TJ-II

Resolution of the experimental proposals Autumn 2019 and Feb_2020

20191122 TJII Access Committee Nov2019 v1.pdf

Experimental proposals, Autumn 2019

Deadline: October 15, 2019

1. TJ-II:Turbulence driven magnetic islands
2. TJ-II:Large pellet injection into NBI-heated plasmas of tJ-II
3. TJ-II:Why fast particle electromagnetic induced stabilization in fusion plasmas?
4. TJ-II:Influence of radial electric field on intermittence near rational surfaces
5. TJ-II: Physics of transport decoupling, an approach to measure the phase relation between density and temperature fluctuations
6. TJ-II: Feed back control of Zonal Flows and turbulence in TJ-II
7. TJ-II:The study of edge turbulence in the presence of ECRH and NBI heating
8. TJ-II: Investigation of Pellet Deposition Profiles and Transports in TJ-II using Integrated Predictive Modelling Codes
9. TJ-II: Electric potential and turbulence studies with HIBP and LP via edge biasing
10. TJ-II: Plasma turbulence and cryogenic pellet injection
11. TJ-II: Impurity injection with TESPEL in TJ-II stellarator
12. TJ-II: Why fast reaction of plasma fluctuations to ECRH ?
13. TJ-II: Searching for AEs suppression scenarios using off-axis ECCD
14. TJ-II: 2D mapping of plasma potential and density and their fluctuations in ECRH plasmas
15. TJ-II:Turbulence and radial electric field asymmetries in different iota magnetic configurations measured by Doppler reflectometry
16. TJ-II: Studies of liquid metal insertion n TJ-II
17. TJ-II:Plasma fueling experiments: influence of gas puffing distribution on plasma behaviour
18. TJ-II:Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling (2)

Resolution of the experimental proposals Autumn 2019

20191122 TJII Access Committee Nov2019 v1.pdf

Experimental proposals, Spring 2019

Deadline: January 29, 2019

1. TJ-II:Searching for zonal fields and zonal flows driven by fast particles in TJ-II
2. TJ-II:Role of isotope mass on the radial width of Zonal Flows
3. TJ-II:Influence of edge radial electric fields on particle and heat in the SOL
4. 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
5. TJ-II:Routine and systematic use of the LIBS
6. TJ-II:Re-commissioning of Fast Ion Loss Detector
7. TJ-II:In situ, real time boronization of TJ-II

Resolution of the experimental proposals Spring 2019

20190301 TJII Access Committee Fe2019 final.pdf

Experimental proposals, Autumn 2018

Deadline: October 10, 2018

1. TJ-II:Influence of positive and negative density gradients in turbulent transport using the HIBP system
2. TJ-II:Turbulence spreading and ECRH modulation experiments in the TJ-II stellarator
3. TJ-II:Pellet Injections into TJ-II plasmas with core fast electron population
4. TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas
5. TJ-II:Er and turbulence asymmetries in low ripple configurations measured by Doppler reflectometry
6. TJ-II:Real Time lithiatiation of TJII
7. TJ-II:Radiation asymmetries and potential variations

Resolution of the experimental proposals Autumn 2018

20181027 Plan TJII Nov Dec 2018 v6.pdf

Experimental proposals, Spring 2018

Deadline: March 7, 2018

1. TJ-II:Observation of suprathermal ions with Neutral Particle Analyzers during electron cyclotron heating in the TJ-II stellarator
2. TJ-II:Poloidal 2D scans to investigate potential and density profiles in the TJ-II stellarator using dual Heavy ion beam probe diagnostic
3. TJ-II:Validation of bootstrap predictions
4. TJ-II:Transport analysis by means of the Transfer Entropy
5. TJ-II:Understanding an often observed transient rise in core electron temperature during pellet injection into TJ-II plasmas
6. TJ-II:Improving fuelling efficiency in TJ-II ECRH plasmas
7. TJ-II:The influence of a core fast electron population on pellet fuelling efficiency in TJ-II
8. TJ-II:Studies of LIquid Metal insertion in TJ-II
9. TJ-II:Fast Camera studies with triple bundle
10. TJ-II:Turbulence and radial electric field asymmetries in high iota magnetic configuration measured by Doppler reflectometry
11. TJ-II:Influence of electron / ion root and ion mass on the radial and frequency structure of zonal flows in TJ-II
12. TJ-II:Blobs vs streamers
13. TJ-II:Investigation of the ECRH power level and deposition radius on impurity confinement after injection by laser blow-off in TJ-II
14. TJ-II:Evaluation of Neoclassical transport correction terms in TJ-II
15. TJ-II:Turbulence studies during transient pellet induced regimes
16. TJ-II:Infrared thermography of the NBI Beam Stop: NBI contribution to plasma fuelling
17. TJ-II:Dependence of NBI-driven Alfvén Eigenmodes on NBI energy and power
18. TJ-II:ECRH system calibration
19. TJ-II: Radiation asymmetries and potential variations

Resolution of the experimental proposals Spring 2018

20180423 Plan TJII April June 2018 v11.pdf

Experimental proposals, Spring 2017

Deadline: January 26, 2017

1. TJ-II:Search for physical mechanisms that lead to increase of turbulence following pellet injection
2. TJ-II:Effect of pellet injection on the radial electric field profile of stellarators
3. TJ-II:Excitation of zonal flow oscillations by energetic particles
4. TJ-II:Radial electric field of low-magnetic-field low-collisionality NBI plasmas
5. TJ-II:Comparison of transport of on-axis and off-axis ECH-heated plasmas
6. TJ-II:Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport
7. TJ-II:PelletFuelling
8. TJ-II:Impurity density and potential asymmetries
9. TJ-II:Investigation of turbulence spreading and information transfer in the TJ-II stellarator
10. TJ-II:Role of isotope effect on biasing induced transitions in the TJ-II stellarator
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
12. TJ-II:Alfven Eigenmodes and biasing in TJ-II
13. TJ-II:Potential asymmetries at low magnetic field
14. TJ-II:NBI contribution to plasma fuelling
15. TJ-II:Investigation of plasma asymmetries in the TJ-II stellarator and comparison with Gyrokinetic simulations
16. TJ-II:Effect of ECRH on the characteristics of Alfven Eigenmodes activity
17. TJ-II:Investigating the Alfvén Wave damping
18. TJ-II:L-H Transition and Isotope Effect in low magnetic ripple configurations
19. TJ-II:Measurements of radial correlation length and tilting of turbulent eddies by Radial Correlation Doppler Reflectometry
20. TJ-II:Measurement of Te and ne of Blobs analyzing recycling helium emission in front of a poloidal limiter
21. TJ-II:Potential Assymetries at low magnetic field

Resolution of the experimental proposals Spring 2017

20170206 Plan TJII Feb June 2017 v15.pdf

See also

• TJ-II:Experimental program (not yet in use)
• Experimental programs for earlier years (2002-2017) (Intranet, password required)
• A new proposal page is created on the basis of this Proposal template. You do not need to view or modify it. Note for administrators: at the end of the template, the category of the proposal is specified (e.g, 'Autumn 2018'), which will determine to which list of proposals the proposal belongs.