LIPS-200E离子推力器栅极组件最敏感参数分析  

Impact of Grid Gap on Ion Beam Perveance in LIPS-200 EIon Thruster: A Simulation and Experimental Study

作　　者：高俊[1] 杨福全[1] 耿海[1] 唐福俊[1] 江豪成[1] 郑茂繁[1] Gao Jun;Yang Fuquan;Geng Hai;Tang Fujun;Jiang Haocheng;Zheng Maofan(Science and Technology on Vacuum Technology and Physics Laboratory, Lanzhou Institute of Physics, Lanzhou 730000, Chin)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《真空科学与技术学报》2017年第11期1050-1055,共6页Chinese Journal of Vacuum Science and Technology

摘　　要：为了解决LIPS-200E离子推力器工作过程中加速栅截获电流较大的问题,本文针对该推力器栅极组件建立了二维数值仿真计算模型,采用仿真计算和理论分析相结合的方法,系统分析了栅极组件几何结构参数和工作电参数对其束流离子聚焦状态的影响。分析结果显示,相比其他结构及电参数,栅间距是影响束流离子聚焦和加速栅截获电流的最关键影响因素,当栅间距为0.06 mm时,栅极组件能很好地引出束流,无任何离子被加速栅所截获。分析结果和实测结果符合一致。Herein,we addressed thetechnicalproblemof high ion-current intercepted by the acceleration grids in Lanzhou Ion Propulsion System（ LIPS-200 E） ion thruster. The impact of the grid-assembly geometry and operation conditions,including but not limited to the gap and size of the acceleration grids,on the perveance of the beam ions was mathematically modeled,theoretically analyzed,numerically simulated and experimentally evaluated with the lab-built test platform. The calculated and simulated results show that the grid gap has a major impact onthe perveance of the beam ion and ion current intercepted by the grids. To be specific,when it comes to the grid assembly with a gap of 0. 06 mm,no charge exchange（ CEX） ion may be interceptedby the acceleration grid and optimal perveance may be realized. The simulated and measured results were found to be in good agreement.

关 键 词：栅极组件 参数 聚焦 加速栅电流 

分 类 号：V439.4[航空宇航科学与技术—航空宇航推进理论与工程] V439.1