A new linear analysis for magnetic helical instabilities of arc discharges in a cylindrical plasma is developed based on a set of electrostatic magnetohydrodynamic equations.

在静电磁流体方程基础上，提出了柱状放电电弧等离子体磁螺旋不稳定性的一种新的线性分析方法。

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Based on two-fluid model of ion and electron and Maxwell equation, the two-dimensional magnetohydrodynamic (MHD) model of vacuum arc was obtained.

以离子与电子的双流体模型以及麦克斯韦方程为基础，推导得到了真空电弧的二维磁流体动力学(MHD)模型。

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