Optimization of magnetic field design for Hall thrusters based on a genetic algorithm  

作　　者：谭睿 杭观荣 王平阳 Rui TAN;Guanrong HANG;Pingyang WANG(School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,People’s Republic of China;Division of Electric Propulsion,Shanghai Institute of Space Propulsion,Shanghai 201112,People’s Republic of China)

机构地区：[1]School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,People’s Republic of China [2]Division of Electric Propulsion,Shanghai Institute of Space Propulsion,Shanghai 201112,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第7期82-92,共11页等离子体科学和技术（英文版）

基　　金：funded by Shanghai Natural Science Foundation(No.12ZR1414700)。

摘　　要：Magnetic field design is essential for the operation of Hall thrusters.This study focuses on utilizing a genetic algorithm to optimize the magnetic field configuration of SPT70.A 2D hybrid PIC-DSMC and channel-wall erosion model are employed to analyze the plume divergence angle and wall erosion rate,while a Farady probe measurement and laser profilometry system are set up to verify the simulation results.The results demonstrate that the genetic algorithm contributes to reducing the divergence angle of the thruster plumes and alleviating the impact of high-energy particles on the discharge channel wall,reducing the erosion by 5.5%and 2.7%,respectively.Further analysis indicates that the change from a divergent magnetic field to a convergent magnetic field,combined with the upstream shift of the ionization region,contributes to the improving the operation of the Hall thruster.

关 键 词：magnetic field design genetic algorithm divergence angle erosion of discharge channel convergent magnetic field 

分 类 号：TG1[金属学及工艺—金属学]