Low-Frequency Instability in Near-Anode Region of Hall Thruster
Low-Frequency Instability in Near-Anode Region of Hall Thruster
复制标题
霍尔推进器近阳极区域的低频不稳定性
DOI：
10.1109/tps.2008.2003359
复制
发表时间：
2008
影响因子：
1.5
通讯作者：
Mauricio M. Guelman
中科院分区：
文献类型：
--
作者：
A. Kapulkin;Mauricio M. Guelman
建立了霍尔推力器加速通道近阳极区等离子体相对低频（nui Lt ω Lt radic（ω eomegai），其中nui为电子电离碰撞频率，ω e和ω i分别为电子和离子回旋频率）不稳定性的理论模型.考虑了沿磁场线沿着无限扩展的二维扰动的行为。在模型中，采用双流体磁流体近似。考虑了电子的有限温度。这种不稳定性是由于电子的有限温度以及等离子体和磁场的不均匀性。就其性质而言，它属于瑞利-泰勒型。这种不稳定性可能是电离区和阳极之间电子转移增强的原因。
This paper is devoted to building a theoretical model of relatively low-frequency (nui Lt omega Lt radic(omegaeomegai), where nui is the frequency of the ionization collisions of the electron and omegae and omegai are the electron and ion cyclotron frequencies, respectively) instability of plasma in the near-anode area of the Hall thruster acceleration channel. The behavior of 2-D perturbations, which are infinitely spread along the magnetic field lines, is considered. In the model, the two-fluid magnetohydrodynamic approximation is used. The finite temperature of electrons is taken into consideration. The instability is due to the finite temperature of the electrons and nonuniformity of both the plasma and magnetic field. By its nature, it belongs to the Rayleigh-Taylor type. The instability can be responsible for the enhanced transfer of the electrons between the ionization region and the anode.