We present the first observation of instability in weakly magnetized, pressure dominated plasma Couette flow firmly in the Hall regime. Strong Hall currents couple to a low frequency electromagnetic mode that is driven by high-$\beta$ ($>1$) pressure profiles. Spectroscopic measurements show heating (factor of 3) of the cold, unmagnetized ions via a resonant Landau damping process. A linear theory of this instability is derived that predicts positive growth rates at finite $\beta$ and shows the stabilizing effect of very large $\beta$, in line with observations.

中文翻译：

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等离子库埃特流中的不稳定性驱动离子加热和流动

我们提出了在霍尔状态下牢固地弱磁化，压力主导的等离子体Couette流不稳定的第一个观察结果。强大的霍尔电流耦合到由高功率驱动的低频电磁模式$\beta$ （$>\mathrm{1个}$）压力曲线。光谱测量结果表明，通过共振Landau阻尼过程加热了未磁化的冷离子（系数为3）。推导了这种不稳定性的线性理论，该理论预测了有限的正增长率$\beta$ 并显示出很大的稳定作用 $\beta$，符合观察结果。