TJ-II:Experimental proposals

TJ-II Model

Updated TJ-II timeline

TJ-II yearly planning 2022-2023

Creation of a new proposal

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Experimental proposals, Spring 2022

Deadline: January 24, 2022

1. 2021-12-21 16:49:28 TJ-II: Influence of magnetic configuration on filament dynamics
2. 2022-01-13 09:32:33 TJ-II:Turbulence properties near a rational surface
3. 2022-01-13 14:24:08 TJ-II: Zeff measurement using visible bremsstrahlung (VB) with NBI heating (II)
4. 2022-01-13 14:37:16 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. 2022-01-13 14:39:23 TJ-II: Multipellet injection in NBI plasmas
6. 2022-01-13 15:12:49 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. 2022-01-18 11:01:06 TJ-II: On the search of Zonal Flows and the influence of Alfvén Eigenmodes in the TJ-II stellarator
8. 2022-01-18 11:16:35 TJ-II:L-H transition studies: characterization of plasma turbulence using Gas Puff Imaging, Probes, Doppler reflectometry and HIBP diagnostics
9. 2022-01-18 11:31:49 TJ-II: Spectroscopic studies of TESPEL-shell ablation clouds
10. 2022-01-18 12:01:54 TJ-II: Studies of pellet plasmoid drift in different magnetic configurations
11. 2022-01-18 13:01:56 TJ-II: SOL Temperature profiles using RFA role of edge radial electric fields
12. 2022-01-18 13:43:11 TJ-II: Determination of the spatial periodicity of NBI-driven Alfvén Eigenmodes and study of its magnetic configuration dependence
13. 2022-01-18 14:03:38 TJ-II:NBI1 vs. NBI2 heated plasma comparison
14. 2022-01-18 14:29:56 TJ-II:Turbulence and flow measured at the 3/2 magnetic island using Doppler reflectometry
15. 2022-01-18 15:54:43 TJ-II: Validation of neutral beam current drive
16. 2022-01-19 14:30:23 TJ-II: impact of impurities on turbulence
17. 2022-01-19 17:02:34 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. 2022-01-20 11:58:20 TJ-II:Imaging of pelet cloud dynamics in TJ-II using Halpha and bremsstraahlung filters and a fast-frame camera
19. 2022-01-20 16:39:17 TJ-II:Searching for AEs suppression scenarios using off-axis ECCD
20. 2022-01-20 17:30:22 TJ-II: Influence of edge radial electric fields on impurity transport
21. 2022-01-20 18:12:28 TJ-II: 2D mapping of plasma parameters using HIBP
22. 2022-01-21 15:01:37 TJ-II: Measurements using Gas Puff Imaging system
23. 2022-01-24 15:54:07 TJ-II: On the electrostatic transport driven by Alfvén modes and broadband turbulence in the plasma edge region of the TJ-II stellarator
24. 2022-01-24 16:00:24 TJ-II: Calibration of the helical arrays of Mirnov coils
25. 2022-03-28 09:36:14 TJ-II: Injection of TESPELs with compounds or multiple elements of interest for W7-X

Session allocation (February - March) ( Feb 18, Approved by the Access Committee on March 2, Minutes).

Session allocation (April - June) ( April 6, Pending approval by the Access 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.