The Hall effect thruster (HET) is an electric propulsion system in which electrons confined in a certain region collide with neutral particles due to the Hall effect. The neutral particles are ionized, and the ions are accelerated by the electric field to produce thrust. Thus, a Hall thruster has a simpler structure than an ion thruster. To improve the accuracy of the HET performance analysis, the energy change of electrons is predicted by considering thermal conduction. The number of ions produced by ionization and the change in electron energy via multivalent ionization are investigated. To minimize the independent variables, the boundary condition is modified after considering the physical correlation of each variable, and a semi-experimental model equation for the Bohm parameter is proposed. The performance results have greater similarity to the experimental results than those of the previous analytical model. Based on this, the performance changes according to the thruster operating conditions are predicted and compared. It is confirmed that the thrust increases by about 10–20% according to the change of propellant mass flow rate due to the increase of ion exit velocity.

中文翻译：

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霍尔效应推进器改进玻姆参数模型的性能参数分析

霍尔效应推进器 (HET) 是一种电力推进系统，其中由于霍尔效应，限制在特定区域的电子与中性粒子碰撞。中性粒子被电离，离子被电场加速产生推力。因此，霍尔推进器的结构比离子推进器简单。为了提高 HET 性能分析的准确性，通过考虑热传导来预测电子的能量变化。研究了电离产生的离子数量和多价电离引起的电子能量变化。为了最小化自变量，在考虑各变量的物理相关性后修改边界条件，提出了Bohm参数的半实验模型方程。与之前的分析模型相比，性能结果与实验结果具有更大的相似性。在此基础上，预测和比较根据推进器运行条件的性能变化。经证实，由于离子出口速度的增加，推进剂质量流量的变化导致推力增加约 10-20%。