中国空间科学技术

中国空间科学技术

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阈值温度、临界能量与航天器带电特性

吴清松,徐燕侯,王柏懿   

  1. 中国科学技术大学,中国科学技术大学,中国科学院力学研究所 合肥 ,合肥 ,北京
  • 发布日期:1993-08-25

EFFECT OF THRESHOLD TEMPERATURE AND CRITICAL ENERGY FOR SPACECRAFT CHARGING

Wu Qingsong Xu Yanhou (University of Science and Technology of China,Hefei) Wang Boyi (Institute of Mechanics,Academia Sinica,Beijing)   

  • Online:1993-08-25
  • Supported by:
    国家自然科学基金

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。

关键词: 航天器带电, 临阈效应, 数学模型, 计算方法

Abstract: 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*.