高能电子辐照下介质材料内沉积电荷分布试验研究  

Experimental study on dielectric materials deposited charge distribution under high-energy electron irradiation

作　　者：王金晓 秦晓刚[2] 梅飞 冯娜 杨生胜[2] 韩焱晖 柳青[2] 陈益峰 WANG Jinxiao;QIN Xiaogang;MEI Fei;FENG Na;YANG Shengsheng;HAN Yanhui;LIU Qing;CHEN Yifeng(College of Chemical and Materials Engineering,Xuchang University,Xuchang 461000,China;Lanzhou Institute of Physics,Lanzhou 730000,China;Beijing Orient Institute for Measurement&Test,Beijing 100086,China)

机构地区：[1]许昌学院化工与材料学院,许昌461000 [2]兰州空间技术物理研究所,兰州730000 [3]北京东方计量测试研究所,北京100086

出　　处：《航天器环境工程》2022年第6期620-625,共6页Spacecraft Environment Engineering

基　　金：装备预研重点实验室基金项目“航天器介质材料静电电位控制研究”(编号:61422050102)。

摘　　要：深层带电是影响航天器在轨安全和正常运行的重要空间环境效应,而高能电子在介质材料内部的沉积电荷分布特性是深层带电效应的重要考量因素。文章采用脉冲电声(pulsed electro-acoustic,PEA)法测试了0.3~1.0 MeV电子辐照下聚酰亚胺(PI)材料内部的沉积电荷分布特性,研究了电子能量和入射电子数对材料内部沉积电荷分布的影响规律。结果表明:高能电子主要沉积在辐照区的后端,随着入射电子数的增加,材料内部沉积的电荷量将不断增加,最终达到稳定状态;能量越高的电子穿透能力越强,并在材料内部形成分布范围更广的电荷沉积峰。Internal charge is an important space environmental effect affecting the safety and normal operation of spacecraft in orbit.The deposited charge distributions in dielectric materials under high-energy electron irradiation is an important factor of internal charge effect.In this paper,the deposited charge distributions in polyimide(PI)materials irradiated by 0.3 MeV to 1.0 MeV electrons was tested by pulsed electro-acoustic(PEA)method.The effects of electron energy and number of incident electrons on the internal deposited charge distributions were studied.The results show that high-energy electrons are mainly deposited at the back end of the irradiation region.With the increase of the number of incident electrons,the amount of charge deposited inside the materials would continue to increase and eventually reach a stable state.The electrons with higher energy have greater penetration ability,resulting in charge deposition peaks with a wider range inside the materials.

关 键 词：高能电子辐照 深层带电效应 沉积电荷分布 脉冲电声法 试验研究 

分 类 号：V520.5[航空宇航科学与技术—人机与环境工程] TM215.1[一般工业技术—材料科学与工程]