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Dependence of locked mode behavior on frequency and polarity of a rotating external magnetic perturbation

机译:锁定模式行为对旋转外部磁扰动的频率和极性的依赖性

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Active control and stabilization of locked modes (LM) via rotating external magnetic perturbations are numerically investigated under a realistic low resistivity condition. To explore plasma responses to rotating and/or static external magnetic perturbations, we have developed a resistive magnetohydrodynamic code 'AEOLUS-IT'. By using AEOLUS-IT, dependencies of mode behavior on frequency and polarity of the rotating magnetic perturbation are successfully clarified. Here, the rotational direction of the rotating magnetic perturbation to the equilibrium plasma rotation in the laboratory frame is referred to as 'polarity'. The rotating magnetic perturbation acts on the background rotating plasma in the presence of a static field. Under such circumstances, there exist bifurcated states of the background rotating plasma, which should be taken into account when studying the dependence of the mode behavior on the rotating magnetic perturbation. It is found that there exist an optimum frequency and polarity of the rotating magnetic perturbation to control the LM, and that the LM is effectively stabilized by a copolarity magnetic perturbation in comparison with a counter-polarity one.
机译:通过旋转外部磁扰动的主动控制和稳定的锁定模式(LM)在现实的低电阻率条件下进行数值研究。为了探讨旋转和/或静态外部磁性扰动的等离子体响应,我们开发了一种电阻磁力学代码'Aeolus-it'。通过使用鸟类 - 它,成功阐明了旋转磁扰动的频率和极性上的模式行为的依赖性。这里,对实验室框架中的旋转磁性扰动的旋转方向被称为“极性”。在静电场存在下,旋转磁扰动作用于背景旋转等离子体。在这种情况下,存在背景旋转等离子体的分叉状态,当研究模式行为对旋转磁性扰动的依赖时,应该考虑到这一点。结果发现,旋转磁性扰动的最佳频率和极性以控制LM,并且与抗极性彼此相比,通过共同磁性扰动有效地稳定LM。

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