scholarly journals Peeling-off of the external kink modes at tokamak plasma edge

2014 ◽  
Vol 21 (8) ◽  
pp. 082515 ◽  
Author(s):  
L. J. Zheng ◽  
M. Furukawa
Keyword(s):  
Tokamak Plasma ◽  
Plasma Edge ◽  
External Kink ◽  
Peeling Off

Stability of a tokamak plasma with diffuse toroidal rotation

2020 ◽  
Vol 86 (5) ◽  
Author(s):  
O. E. López ◽  
L. Guazzotto
Keyword(s):  
Shooting Method ◽  
Tokamak Plasma ◽  
Solution Technique ◽  
Large Aspect Ratio ◽  
Internal Resonances ◽  
Flow Shear ◽  
Magnetic Shear ◽  
The Stability ◽  
External Kink ◽  
Selection Of

The present work considers the stability of a high- $\beta$ , large aspect ratio, circular plasma with diffuse profiles for the safety factor and the angular toroidal frequency (López & Guazzotto, Phys. Plasmas, vol. 24, 032501). An application of the Frieman–Rotenberg formalism results in a system of scalar eigenmode equations whose coupling is retained at the plasma–vacuum transition but is disregarded across the plasma column, which is a standard practice. The solution technique consists of a multidimensional shooting method for the poloidal harmonics; robust initial guesses are constructed by solving the dispersion relation in the static scenario with vanishing magnetic shear. Flow shear appears as a high- $\beta$ toroidal contribution, and we illustrate its destabilizing influence on $n=1$ external kink modes in the presence of ideal and resistive walls. Internal resonances are avoided by means of the selection of appropriate equilibrium parameters. The stabilizing influence of a finite positive average magnetic shear is also exemplified.

Spectroscopic method to directly measure electric field distribution in tokamak plasma edge

1997 ◽  
Vol 68 (1) ◽  
pp. 1028-1031 ◽  
Author(s):  
K. Takiyama ◽  
T. Katsuta ◽  
M. Watanabe ◽  
S. Li ◽  
T. Oda ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
Electric Field Distribution ◽  
Spectroscopic Method ◽  
Tokamak Plasma ◽  
Plasma Edge

Tokamak plasma edge modelling including the main chamber wall

2011 ◽  
Vol 51 (8) ◽  
pp. 083023 ◽  
Author(s):  
M. Baelmans ◽  
P. Börner ◽  
W. Dekeyser ◽  
D. Reiter
Keyword(s):  
Chamber Wall ◽  
Tokamak Plasma ◽  
Plasma Edge ◽  
Main Chamber

scholarly journals Continuum kinetic modeling of the tokamak plasma edge

2016 ◽  
Vol 23 (5) ◽  
pp. 056102 ◽  
Author(s):  
M. A. Dorf ◽  
M. R. Dorr ◽  
J. A. Hittinger ◽  
R. H. Cohen ◽  
T. D. Rognlien
Keyword(s):  
Kinetic Modeling ◽  
Tokamak Plasma ◽  
Plasma Edge
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