scholarly journals On Collapses in Strong Reversed Shear Plasmas During or Just After Plasma Current Ramp-Up in JT-60U

2021 ◽  
Vol 16 (0) ◽  
pp. 1402089-1402089
Author(s):  
Takahiro BANDO ◽  
Hiroshi TOJO ◽  
Manabu TAKECHI ◽  
Nobuyuki AIBA ◽  
Takuma WAKATSUKI ◽  
...  
Keyword(s):  
Plasma Current ◽  
Current Ramp ◽  
Reversed Shear

scholarly journals Investigation of Ideal-MHD Stable Scenario for Plasma Current Ramp-Up with No Magnetic Flux Consumption in JT-60SA

2016 ◽  
Vol 11 (0) ◽  
pp. 2403068-2403068 ◽  
Author(s):  
Takuma WAKATSUKI ◽  
Takahiro SUZUKI ◽  
Nobuhiko HAYASHI ◽  
Junya SHIRAISHI ◽  
Shunsuke IDE ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Plasma Current ◽  
Current Ramp ◽  
Ideal Mhd ◽  
Flux Consumption

scholarly journals Nonlinear Coupling of Reversed Shear Alfvén Eigenmode and Toroidal Alfvén Eigenmode during Current Ramp

2021 ◽  
Vol 38 (3) ◽  
pp. 035201
Author(s):  
Shizhao Wei ◽  
Yahui Wang ◽  
Peiwan Shi ◽  
Wei Chen ◽  
Ningfei Chen ◽  
...  
Keyword(s):  
Nonlinear Coupling ◽  
Current Ramp ◽  
Reversed Shear

Healing plasma current ramp-up by Nitrogen seeding in the full Tungsten environment of WEST

2022 ◽  
Author(s):  
Patrick Maget ◽  
Pierre Manas ◽  
Jean-Francois Artaud ◽  
Clarisse Bourdelle ◽  
Jerome B Bucalossi ◽  
...  
Keyword(s):  
Core Temperature ◽  
Relative Concentration ◽  
Turbulent Transport ◽  
Plasma Current ◽  
Large Core ◽  
Nitrogen Injection ◽  
Current Ramp ◽  
Edge Radiation ◽  
Mhd Stability ◽  
Raptor Code

Abstract Achieving a successful plasma current ramp-up in a full Tungsten tokamak can be challenging due to the large core radiation (and resulting low core temperature) that can be faced with this heavy metallic impurity if its relative concentration is too high. Nitrogen injection during the plasma current ramp-up of WEST discharges greatly improves core temperature and Magneto-Hydro-Dynamic stability. Experimental measurements and integrated simulations with the RAPTOR code complemented with the Qualikiz Neural Network for computing turbulent transport allow a detailed understanding of the mechanisms at play. Increased edge radiation during this transient phase is shown to improve confinement properties, driving higher core temperature and better MHD stability. This also leads to increased operation margins with respect to Tungsten contamination.

Lower hybrid assisted plasma current ramp-up in ITER

2009 ◽  
Vol 51 (6) ◽  
pp. 065020 ◽  
Author(s):  
S H Kim ◽  
J F Artaud ◽  
V Basiuk ◽  
A Bécoulet ◽  
V Dokuka ◽  
...  
Keyword(s):  
Lower Hybrid ◽  
Plasma Current ◽  
Current Ramp

scholarly journals Experimental study of reversed shear Alfvén eigenmodes during the current ramp in the Alcator C-Mod tokamak

2010 ◽  
Vol 52 (11) ◽  
pp. 115003 ◽  
Author(s):  
E M Edlund ◽  
M Porkolab ◽  
G J Kramer ◽  
L Lin ◽  
Y Lin ◽  
...  
Keyword(s):  
Experimental Study ◽  
Current Ramp ◽  
Alfven Eigenmodes ◽  
Reversed Shear

Plasma current ramp-up assisted by outer vertical field coils in a high aspect ratio tokamak

2002 ◽  
Vol 42 (10) ◽  
pp. 1257-1272 ◽  
Author(s):  
Osamu Mitarai ◽  
Ryuji Yoshino ◽  
Kenkichi Ushigusa
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Plasma Current ◽  
Current Ramp ◽  
Vertical Field
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