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Observation of Centrifugally Driven Interchange Instabilities in a Plasma Confined by a Magnetic Dipole

机译:电磁偶极子约束的等离子体中离心驱动的交换不稳定性的观察

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摘要

Centrifugally driven interchange instabilities are observed in a laboratory plasma confined by a dipole magnetic field. The instabilities appear when an equatorial mesh is biased to drive a radial current that causes rapid axisymmetric plasma rotation. The observed instabilities are quasicoherent in the laboratory frame of reference; they have global radial mode structures and low azimuthal mode numbers, and they are modified by the presence of energetic, magnetically confined electrons. Results from a self-consistent nonlinear simulation reproduce the measured mode structures.
机译:在由偶极子磁场限制的实验室等离子体中观察到了离心驱动的交换不稳定性。当赤道网格被偏置以驱动引起快速轴对称等离子体旋转的径向电流时,会出现不稳定性。在实验室参考框架中观察到的不稳定性是准相干的;它们具有整体的径向模态结构和低的方位模数,并且由于存在高能的,受磁约束的电子而被修饰。自洽非线性仿真的结果重现了测得的模式结构。

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