Effect of toroidal plasma flow and flow shear on global magnetohydrodynamic MHD modes
Effect of toroidal plasma flow and flow shear on global magnetohydrodynamic MHD modes
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DOI：
10.1063/1.871247
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发表时间：
1995-06
影响因子：
2.2
通讯作者：
M. Chu;J. M. Greene;T. Jensen;R. Miller;A. Bondeson;R. W. Johnson;M. Mauel
中科院分区：
文献类型：
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作者：
M. Chu;J. M. Greene;T. Jensen;R. Miller;A. Bondeson;R. W. Johnson;M. Mauel
本文研究了亚音速环形流对有外阻壁的托卡马克等离子体线性磁流体动力学稳定性的影响。对一般扭结和撕裂模的稳定性提出了一个复杂的非自伴本征值问题，并进行了数值求解，并应用于高β托卡马克。结果表明，环形等离子体流，在等离子体中的耗散结合，可以打开一个窗口的外壁的位置的稳定性。在这个窗口中，稳定的等离子体β值可以显著超过没有壁的Troyon标度定律预测的值。利用实验数据的计算表明与观测结果吻合良好。
The effect of a subsonic toroidal flow on the linear magnetohydrodynamic stability of a tokamak plasma surrounded by an external resistive wall is studied. A complex non‐self‐adjoint eigenvalue problem for the stability of general kink and tearing modes is formulated, solved numerically, and applied to high β tokamaks. Results indicate that toroidal plasma flow, in conjunction with dissipation in the plasma, can open a window of stability for the position of the external wall. In this window, stable plasma beta values can significantly exceed those predicted by the Troyon scaling law with no wall. Computations utilizing experimental data indicate good agreement with observations.