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Nonlinear three-dimensional simulations of resistive wall modes

Published online by Cambridge University Press:  20 December 2006

M. SATO  and
N. NAKAJIMA
M. SATO
Affiliation:
National Institute for Fusion Science, Toki, 509-5292, Japan
N. NAKAJIMA
Affiliation:
National Institute for Fusion Science, Toki, 509-5292, Japan
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Abstract

Nonlinear behavior of the resistive wall modes (RWMs) has been studied using nonlinear three-dimensional simulation code based on the reduced magnetohydrodynamic equations in a cylindrical tokamak. The vacuum is replaced by a highly resistive plasma using the pseudo-vacuum model. For the case that the RWM with $(m,n)\,{=}\,(3,1)$ mode and the internal $(m,n)\,{=}\,(5,2)$ mode are unstable, the RWM with $(m,n) \,{=}\, (3,1)$ mode enhances the growth rate of the internal $(m,n)\,{=}\,(5,2)$ mode in the nonlinear phase. The magnetic field line stochastization is obtained around the plasma edge due to the overlapping of the magnetic islands of the $(m,n)\,{=}\,(3,1)$ mode and the $(m,n)\,{=}\,(5,2)$ mode.

Type
Papers
Information
Journal of Plasma Physics , Volume 72 , Issue 6 , December 2006 , pp. 1223 - 1227
Copyright
2006 Cambridge University Press

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