物理学报Issue(18)：1-9,9.DOI:10.7498/aps.63.182901
多模式离子推力器栅极系统三维粒子模拟仿真
Three-dimensional particle in cell simulation of multi-mo de ion thruster optics system
摘要
Abstract
The optics is one of the main components of an ion thrust, which influences the performance and thruster lifetime. The operation of ion thruster can be evaluated by numerical simulation based on the current-voltage entrance condition, especially for thruster with a variety of operating modes. The plasma transport process is simulated with 3D-PIC (particle in cell) method for a two-grids optic. The performances of the NSTAR thruster under different operating modes are calculated and compared with the results of in-orbit test, verifying the correctness of the simulation mode. The influences of operation modes on the electric field distribution and the beam state are analyzed, and the requirements of multi-mode design for ion thruster are discussed. The results show that a convex sheath and concave zero equipotential surface away from the optic, low value of “saddle point”, and gentle downstream potential distribution, which help to improve ion pass rate, suppress electronic reflux and reduce Pits-and-Grooves corrosion, are the target of ion thruster mode design. Increasing beam voltage will result in a high loss caused by the divergence angle, and extend the beam current range for a good operation condition. For a large beam current mode, high beam voltage will make the beam have a better“focus”state, and reduce the Barrel corrosion. The results will provide a reference for the operation mode design for the multi-mode ion thruster.关键词
粒子模拟/离子推力器/栅极系统/等离子体模拟Key words
particle in cell/ion thruster/optic/plasma simulation引用本文复制引用
陈茂林,夏广庆,毛根旺..多模式离子推力器栅极系统三维粒子模拟仿真[J].物理学报,2014,(18):1-9,9.基金项目
国家自然科学基金(批准号:51276147,11105023,11275034)、中央高校基本科研业务费专项资金(批准号:3102014KYJD005)、西北工业大学基础研究基金(批准号：NPU-FFR-JC20120201)和工业装备结构分析国家重点实验室开放基金(批准号：GZ1101)资助的课题.* Project supported by the National Natural Science Foundation of China (Grant Nos.51276147,11105023,11275034), the Fundamental Research Funds for the Central Universities, China (Grant No.3102014KYJD005), the NPU Foundation for Fundamental Research, China (Grant No. NPU-FFR-JC20120201), and Open Project of State Key Laboratory of Structural Analysis for Industrial Equipment, China (Grant No. GZ1101) （批准号:51276147,11105023,11275034）
