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首页> 外文期刊>The Open Plasma Physics Journal >Resistive Instabilities in a Hall Thruster Under the Presence of Collisions and Thermal Motion of Electrons
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Resistive Instabilities in a Hall Thruster Under the Presence of Collisions and Thermal Motion of Electrons

机译：存在碰撞和电子热运动时霍尔推力器的电阻不稳定性

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摘要

The electrostatic and electromagnetic low frequency waves propagating in azimuthal direction in a Hall thrusterchannel are found to be unstable due to the resistive coupling to the electrons’ closed drift in the presence of collisions.The thermal motion of the electrons and their collisions significantly affect the growth of these waves. With respect to thecollision frequency, wave number, electron temperature and plasma density, both the instabilities grow in a similarfashion but they behave oppositely under the effects of magnetic field and electron drift velocity. In both the cases,smaller wavelength oscillations are found to be most unstable, and magnitude of the growth rate of the electrostatic wavesupersedes that of the electromagnetic wave. The electrostatic instability is more sensitive to the electron collisions incomparison with the electromagnetic instability. On the other hand, the electromagnetic instability is suppressed in thepresence of larger ion drift velocity.
机译：在霍尔推力器通道中沿方位角方向传播的静电和电磁低频波由于存在碰撞而与电子的闭合漂移发生电阻耦合而不稳定，电子的热运动及其碰撞显着影响生长这些浪潮中关于碰撞频率，波数，电子温度和等离子体密度，这两种不稳定性都以相似的方式增长，但是在磁场和电子漂移速度的影响下，它们的行为却相反。在这两种情况下，都发现较小的波长振荡最不稳定，并且静电波的增长率超过了电磁波的增长率。与电磁不稳定性相比，静电不稳定性对电子碰撞更敏感。另一方面，在较大的离子漂移速度的情况下抑制了电磁不稳定。

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