强流脉冲电子束中影响潘宁放电因素的模拟分析  

Simulation Analysis of Factors Affecting Penning Discharge in High Current Pulsed Electron Beam

作　　者：古亮 杨捷 赵华 谭巍 李金荣 GU Liang;YANG Jie;ZHAO Hua;TAN Wei;LI Jinrong(School of Electrical and Electronic Engineering,Chongqing University of Technology,Chongqing 400054,China;Chongqing Energy Internet Engineering Technology Research Center,Chongqing 400054,China)

机构地区：[1]重庆理工大学电气与电子工程学院,重庆400054 [2]重庆市能源互联网工程技术研究中心,重庆400054

出　　处：《真空科学与技术学报》2024年第2期184-190,共7页Chinese Journal of Vacuum Science and Technology

基　　金：国家国际科技合作专项项目(2015DFR70480);国家自然科学基金培育计划项目(2021PY211)。

摘　　要：为研究强流脉冲电子束内部潘宁离子源电离情况的影响因素,文章基于有限元仿真软件建立二维轴对称模型对其内部磁场和电子分布进行仿真,再从阳极电压、磁场强度、气压三个方面对氩气潘宁放电及径向分布的影响进行了模拟仿真研究,对电离情况和电子分布随这三个因素变化的情况进行了分析。仿真结果表明:在较高气压状态下,电场较小时,电场对电离度的影响是正相关;电场较大时,电场对电离度的影响是负相关。磁场增大会提高电离率,提升到1 T之后磁场强度提高不会影响电离率。电磁场对电子径向分布影响不明显。气压与电离度呈正相关。此外,气压越小,电子径向分布越均匀。In order to study the factors affecting the ionization of Penning ion source inside a high-current pulsed electron beam,a two-dimensional axisymmetric model was established based on the finite element simulation software to simulate the internal magnetic field and electron distribution,and then the effects of anode voltage,magnetic field strength and air pressure on the argon Penning discharge and radial distribution were simulated and studied.The ionization condition and the variation of electron distribution with these three factors are analyzed.The simulation results show that the effect of the electric field on ionization is positively correlated with that of a low electric field at high pressure.When the electric field is large,the influence of the electric field on the ionization degree is negatively correlated.The increase in magnetic field will increase the ionization rate,and the increase in magnetic field intensity will not affect the ionization rate after the increase to 1 T.The influence of the electromagnetic field on the radial distribution of electrons is not obvious.Pressure is positively correlated with ionization.In addition,the smaller the pressure,the more uniform the radial distribution of electrons.

关 键 词：强流脉冲电子束 潘宁放电 影响因素 电子密度 

分 类 号：O531[理学—等离子体物理]