混合能量电子辐照聚酰亚胺的带电特性  

Charging Characteristics of Polyimide Irradiated by Electron with Complex Energies

作　　者：刘婧[1] 张海波[1] 

机构地区：[1]西安交通大学电子科学与技术系,西安710049

出　　处：《西安交通大学学报》2014年第8期1-6,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(11175140)

摘　　要：针对空间中混合电子辐照聚酰亚胺所引起的航天器静电放电异常事件,以及对复杂条件下混合电子辐照聚合物的带电特性仍缺乏了解等问题,提出了符合地球同步轨道电子参考谱分布的混合电子模型。该模型主要讨论了混合电子辐照聚酰亚胺带电过程中的散射电荷分布、空间电荷分布、空间电场分布和聚合物样品参量影响下的空间电位分布。研究结果表明:在平衡态时空间电位随捕获密度和样品厚度的增大而降低,随电子迁移率的增大而升高;样品厚度对空间电位的影响明显大于电子迁移率和捕获密度的影响。Charging characteristics of polyimide irradiated due to electron with complex energies is the basis to study and to prevent electrostatic discharge in space radiation environment.However,charging characteristics of sample thickness,electron mobility and trap density in complex conditions are still less known.A comprehensive model to simulate the charging process of polymer irradiated due to multi-energetic electrons with complex energies is presented,and the electron with complex energies accords with electron spectrum at geostationary orbit.The scattering charge distribution,the space charge distribution,the space field distribution and the sample parameters on space potential are simulated.The results show that decreasing electron mobility,increasing trap density and increasing thickness lead to an increase in space potential and prolong the balance of the charging process.Effect of sample thickness is significantly greater than that of the electron mobility and trap density.

关 键 词：聚酰亚胺 混合能量电子 带电特性 空间电荷 辐照 

分 类 号：TN2[电子电信—物理电子学]