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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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!
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Experimental proposals, Spring 2022

Deadline: January 24, 2022

1. 28 March 2022: TJ-II: Injection of TESPELs with compounds or multiple elements of interest for W7-X
2. 24 January 2022: TJ-II: Calibration of the helical arrays of Mirnov coils
3. 24 January 2022: TJ-II: On the electrostatic transport driven by Alfvén modes and broadband turbulence in the plasma edge region of the TJ-II stellarator
4. 21 January 2022: TJ-II: Measurements using Gas Puff Imaging system
5. 20 January 2022: TJ-II: 2D mapping of plasma parameters using HIBP
6. 20 January 2022: TJ-II: Influence of edge radial electric fields on impurity transport
7. 20 January 2022: TJ-II:Searching for AEs suppression scenarios using off-axis ECCD
8. 20 January 2022: TJ-II:Imaging of pelet cloud dynamics in TJ-II using Halpha and bremsstraahlung filters and a fast-frame camera
9. 19 January 2022: 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?
10. 19 January 2022: TJ-II: impact of impurities on turbulence
11. 18 January 2022: TJ-II: Validation of neutral beam current drive
12. 18 January 2022: TJ-II:Turbulence and flow measured at the 3/2 magnetic island using Doppler reflectometry
13. 18 January 2022: TJ-II:NBI1 vs. NBI2 heated plasma comparison
14. 18 January 2022: TJ-II: Determination of the spatial periodicity of NBI-driven Alfvén Eigenmodes and study of its magnetic configuration dependence
15. 18 January 2022: TJ-II: SOL Temperature profiles using RFA role of edge radial electric fields
16. 18 January 2022: TJ-II: Studies of pellet plasmoid drift in different magnetic configurations
17. 18 January 2022: TJ-II: Spectroscopic studies of TESPEL-shell ablation clouds
18. 18 January 2022: TJ-II:L-H transition studies: characterization of plasma turbulence using Gas Puff Imaging, Probes, Doppler reflectometry and HIBP diagnostics
19. 18 January 2022: TJ-II: On the search of Zonal Flows and the influence of Alfvén Eigenmodes in the TJ-II stellarator
20. 13 January 2022: 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.
21. 13 January 2022: TJ-II: Multipellet injection in NBI plasmas
22. 13 January 2022: 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
23. 13 January 2022: TJ-II: Zeff measurement using visible bremsstrahlung (VB) with NBI heating (II)
24. 13 January 2022: TJ-II:Turbulence properties near a rational surface
25. 21 December 2021: TJ-II: Influence of magnetic configuration on filament dynamics
26. 20 December 2021: TJ-II:Proposal template

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: Turbulent ExB transport studies using HIBP and edge probes
2. TJ-II: Zeff measurement using visible bremsstrahlung emissions with NBI heating
3. 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
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: Evolution of LCR by HIBP and Probes
6. TJ-II: Pellet induced Enhanced Confinement: the role of Er and turbulence
7. TJ-II: On the physics of the density limit

Experimental proposals, Spring 2021

Deadline: January 30, 2021

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

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

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

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:In situ, real time boronization of TJ-II
2. TJ-II:Re-commissioning of Fast Ion Loss Detector
3. TJ-II:Routine and systematic use of the LIBS
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:Influence of edge radial electric fields on particle and heat in the SOL
6. TJ-II:Role of isotope mass on the radial width of Zonal Flows
7. TJ-II:Searching for zonal fields and zonal flows driven by fast particles in 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:Radiation asymmetries and potential variations
2. TJ-II:Real Time lithiatiation of TJII
3. TJ-II:Er and turbulence asymmetries in low ripple configurations measured by Doppler reflectometry
4. TJ-II:Validation of ECCD predictions in TJ-II ECRH plasmas
5. TJ-II:Pellet Injections into TJ-II plasmas with core fast electron population
6. TJ-II:Turbulence spreading and ECRH modulation experiments in the TJ-II stellarator
7. TJ-II:Influence of positive and negative density gradients in turbulent transport using the HIBP system

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

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

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.