航天器环境工程2017，Vol.34Issue(2)：183-189,7.DOI:10.3969/j.issn.1673-1379.2017.02.013
高能电子辐照下介质-导体相间结构深层充电特性研究
Charging characteristics of dielectric-conductor alternately layered structure under energetic electron irradiation
摘要
Abstract
To investigate the charging characteristics of the dielectric-conductor alternately layered structure, various samples are designed and irradiated by the90Srβ source to simulate the energetic-electron environment in space and the sample charging potentials are measured during the experiment. By using the 3-D simulation tool of deep dielectric charging, various structures are modeled and the charging potential and the electric field are calculated numerically. Experimental and simulation results show that the maximum dielectric surface potential and the built-in electric field of the structure are positively correlated with the width and the height (over the conductor surface) of the dielectric. The wider or higher the dielectric is, the greater the discharging risk will be. Especially when there is a narrow gap between the dielectric and the conductor, the electric field inside the dielectric will be enhanced dramatically and may result in an internal break-down. The electric field in the gap region might easily exceed the vacuum break-down threshold value. To mitigate the internal charging hazards of such structures in space engineering applications, the width and the height of the dielectric should be minimized as far as possible and the gap between the dielectric and the conductor must be avoided.关键词
高能电子/介质深层充电/试验/三维仿真Key words
energetic electron/deep dielectric charging/experiment/three-dimensional simulation分类
航空航天引用本文复制引用
郑汉生,杨涛,韩建伟,张振龙,刘继奎..高能电子辐照下介质-导体相间结构深层充电特性研究[J].航天器环境工程,2017,34(2):183-189,7.基金项目
国防基础科研计划项目(编号:B1320133032) （编号:B1320133032）
