Ideal magnetohydrodynamic stability of configurations without nested flux surfaces
Ideal magnetohydrodynamic stability of configurations without nested flux surfaces
复制标题
无嵌套磁通表面的配置的理想磁流体动力学稳定性
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
S. Newton
中科院分区：
文献类型：
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作者：
P. Helander;S. Newton
现有的计算磁约束等离子体MHD稳定性的数值工具一般都假定存在嵌套磁通面。因此，这些工具不能立即适用于具有磁岛或具有遍历磁场的区域的配置。然而，在实践中，这些孤岛或遍历区域往往很小，它们对MHD稳定性的影响可以用本文发展的微扰理论来评估。这一过程允许计算破缺磁拓扑对每个本征模稳定性的影响，而不需要任何关于扰动本征函数的知识。
Existing numerical tools for calculating the MHD stability of magnetically confined plasmas generally assume the existence of nested flux surfaces. These tools are therefore not immediately applicable to configurations with magnetic islands or regions with an ergodic magnetic field. However, in practice, these islands or ergodic regions are often small, and their effect on MHD stability can then be evaluated using a perturbation theory developed in the present paper. This procedure allows the effect of the broken magnetic topology on the stability of each eigenmode to be calculated without requiring any knowledge about the perturbed eigenfunctions.