Stabilization of ideal plasma resistive wall modes in cylindrical geometry: The effect of resistive layers
Stabilization of ideal plasma resistive wall modes in cylindrical geometry: The effect of resistive layers
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DOI：
10.1063/1.871078
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发表时间：
1995-10
影响因子：
2.2
通讯作者：
J. Finn
中科院分区：
文献类型：
--
作者：
J. Finn
构造了一个具有外共振理想磁流体动力学不稳定性的有限β圆柱模型。该谐振模式在等离子体内具有模式有理曲面，其中安全因子q等于m/n。在该模型中，理想模式的扰动径向磁场在模式有理表面和壁之间是非零的，即使它必须在模式有理表面处为零。该模式的这一特性与环形外部扭结相同。结果表明，在参数范围内，这种理想的模式是稳定的，但不稳定的壁在无穷远的导电壁，电阻壁模式持续存在。然而，在等离子体电阻率的存在下，在一个电阻层的模式合理的表面，这个电阻壁模式可以稳定的等离子体旋转频率的顺序标称电阻不稳定性增长率。此外，稳定发生在壁位置或β中的大间隙中。它还表明，对于理想的...
A cylindrical model with finite beta having an external resonant ideal magnetohydrodynamic instability has been constructed. This resonant mode has a mode rational surface, where the safety factor q equals m/n, within the plasma. In this model, the perturbed radial magnetic field for the ideal mode is nonzero between the mode rational surface and the wall, even though it must vanish at the mode rational surface. This property of the mode is in common with the toroidal external kink. Results are presented showing that in the parameter range for which this ideal mode is stable with a conducting wall but unstable with the wall at infinity, a resistive wall mode persists. However, in the presence of plasma resistivity in a resistive layer about the mode rational surface, this resistive wall mode can be stabilized by a plasma rotation frequency of order a nominal resistive instability growth rate. Furthermore, the stabilization occurs in a large gap in wall position or beta. It is also shown that for the ideal...