Full Particles Simulation on the Effects of Discharge Chamber Structure on the Plasma Characteristics of Electron-Bombardment Ion Thruster

doi:10.7652/xjtuxb202107002

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Full Particles Simulation on the Effects of Discharge Chamber Structure on the Plasma Characteristics of Electron-Bombardment Ion Thruster

更新时间：2025-07-09

- Full Particles Simulation on the Effects of Discharge Chamber Structure on the Plasma Characteristics of Electron-Bombardment Ion Thruster
- Vol. 55, Issue 7, Pages: 12-20(2021)
- 作者机构：
  
  西安交通大学电气工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202107002
  CLC： V431
- Online First：10 July 2021，
  
  Published：2021
- 稿件说明：
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Full Particles Simulation on the Effects of Discharge Chamber Structure on the Plasma Characteristics of Electron-Bombardment Ion Thruster[J]. 2021, 55(7): 12-20.
DOI：

Full Particles Simulation on the Effects of Discharge Chamber Structure on the Plasma Characteristics of Electron-Bombardment Ion Thruster[J]. 2021, 55(7): 12-20. DOI： 10.7652/xjtuxb202107002.

摘要

为明确电子轰击式离子推力器放电腔结构对推力器推力、比冲等性能的影响

采用基于蒙特卡罗碰撞的网格粒子(PIC/MCC)方法

建立了放电腔的全粒子二维轴对称仿真模型

对10 cm×5 cm圆柱型放电腔内部的等离子体特性开展研究。结果表明:双进气口放电腔的电离率、推力、比冲和放电损耗优于单进气口

但放电腔出口处的离子分布均匀性相对较差; 阴极长度的增加可以减弱离子回流现象

提升推力器宏观性能参数

但阴极过长会降低腔内电离率; 针对所讨论的推力器

阴极长度在4～5 cm区间内的综合性能最优。仿真得到了不同工质气体进气口位置和阴极位置对等离子体参数及推力器宏观性能参数的影响

可为放电腔的实际设计提供一定参考。

Abstract

In order to clarify how the structure of electron-bombardment ion thruster influences the thruster properties like thrust

impulse and so on

a two-dimensional axial symmetry full particles numerical model is established based on the PIC/MCC method to carry out research on the plasma characteristics in a 10 cm×5 cm cylindrical discharge chamber. The simulation results show that the discharge chamber with double inlets has better performance than that with a single inlet on ionization rate

thrust

impulse and discharge loss except ion density distribution at the exit. As the cathode length increases

the ion reflux can be weakened and the macroscopic properties are better. However

when the cathode length is much longer

it would reduce the ionization rate. The cathode length in the range between 4 and 5 cm is optimal for the thruster. According to the simulation

the influences of different propellant inlet positions and cathode placement on the plasma characteristics and thruster performance are considered

which can provide a general reference for the actual design of discharge chambers.

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references

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