Nonlinear three-dimensional simulations of resistive wall modes
Nonlinear three-dimensional simulations of resistive wall modes
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DOI：
10.1017/s0022377806005988
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发表时间：
2006-12
影响因子：
2.5
通讯作者：
M. Sato;N. Nakajima
中科院分区：
文献类型：
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作者：
M. Sato;N. Nakajima
采用基于简化磁流体动力学方程的三维非线性模拟程序，研究了圆柱托卡马克中电阻壁模的非线性行为。采用伪真空模型，用高阻等离子体代替真空。对于$（m，n）\，{=}\，（3，1）$模式的RWM和内部$（m，n）\，{=}\，（5，2）$模式不稳定的情况，$（m，n）\，{=}\，（3，1）$模式的RWM增强了非线性阶段内部$（m，n）\，{=}\，（5，2）$模式的增长率。由于$（m，n），{=}，（3，1）$模和$（m，n），{=}，（5，2）$模的磁岛的重叠，在等离子体边缘附近得到了磁力线的随机化。
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.