Alfvén continuum and high-frequency eigenmodes in optimized stellarators
Alfvén continuum and high-frequency eigenmodes in optimized stellarators
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优化仿星器中的阿尔芬连续谱和高频本征模
DOI：
10.1063/1.1339228
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发表时间：
2001
影响因子：
2.2
通讯作者：
O. P. Fesenyuk
中科院分区：
文献类型：
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作者：
Y. Kolesnichenko;V. Lutsenko;H. Wobig;Y. Yakovenko;O. P. Fesenyuk
推导了优化后的Wendelstein线（Helias构型）仿星器的剪切Alfven本征模（AE）方程。该方程中包含的度规张量系数是解析计算的。开发了两个数值代码：第一个是用于研究Alfven连续体结构的COBRA (COntinuum BRanches of Alfven waves)；第二种是解决特征值问题的BOA （Branches Of Alfven modes）。得到了Helias位形Alfven连续统中可能的间隙族。预测等离子体沿环面大方位角截面形状的变化或受其强烈影响而产生的间隙是存在的。在这些间隙中，发现了离散本征模，即螺旋诱导本征模（HAE21）和镜像诱导本征模（MAE）。结果表明，等离子体的不均匀性可以在较宽的定位范围内抑制ae。
An equation of shear Alfven eigenmodes (AE) in optimized stellarators of Wendelstein line (Helias configurations) is derived. The metric tensor coefficients, which are contained in this equation, are calculated analytically. Two numerical codes are developed: the first one, COBRA (COntinuum BRanches of Alfven waves), is intended for the investigation of the structure of Alfven continuum; the second, BOA (Branches Of Alfven modes), solves the eigenvalue problem. The family of possible gaps in Alfven continuum of a Helias configuration is obtained. It is predicted that there exist gaps which arise due to or are strongly affected by the variation of the shape of the plasma cross section along the large azimuth of the torus. In such gaps, discrete eigenmodes, namely, helicity-induced eigenmodes (HAE21) and mirror-induced eigenmodes (MAE) are found. It is shown that plasma inhomogeneity may suppress the AEs with a wide region of localization.
Schwab,C：“理想磁流体动力学：三维等离子体构型的全局模式分析”流体物理学 B 5. 5(9)。
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