摘要
采用加权求和方法确定不同能量入射电子对应不同次级(二次发射和反向散射)电子产率公式,用来计算航天材料高压带电的阈值温度T~* 和临界能量E~*,得到了与观测数据较为接近的临界带电特性。文中进一步阐明运用T~* 和E~* 两个概念,可以定性解释航天器带电的复杂特性。
In this paper,the yields of secondary electrons(true secon-dary emission and backscattering)for the incident electrons at differentenergy levels are determined by using weighted average,and the thresholdtemperature T* and critical energy E* of spacecraft materials in high-voltage charging are calculated with these results.The characteristics of cri-tical charging are in good agreement with the observed data.It is expoun-ded that the complicated properties of spacecraft charging are truly qua-litatively explained by using the two concepts of T* and E*.
出处
《中国空间科学技术》
EI
CSCD
北大核心
1993年第4期44-51,69,共9页
Chinese Space Science and Technology
基金
国家自然科学基金
关键词
航天器带电
临阈效应
数学模型
Spacecraft charging,Threshold effect,Mathematical model,Calculation method.
