A deep dielectric charging model of a solar array drive assembly (SADA) under the coupling effect of electron irradiation and operating voltage is established based on the bipolar charge transport process. The distribution of space charge, potential and electric field in SADA are simulated and analyzed under three different operating conditions, i.e., flux model for internal charging (FLUMIC) spectrum electron irradiation acting alone; operating voltage acting alone; electron irradiation and operating voltage coupled. The effects of electron flux enhancement, electron direction, and operating voltage on charging properties are studied. Based on these investigations, discharge risk and location are pointed out. In the case of electrons incident from the end surface acting alone, much more space charge will accumulate than that from the columnar surface, and the maximum electric field will be above 10 ⁸ V/m when the flux enhancement exceeds 100. When the operating voltage acts alone, the maximum electric field will not exceed 10 ⁷ V/m as long as the operating voltage is below 8772 V. Under typical spectrum, the maximum electric field under coupling effect increases linearly as the operating voltage increases. When the electron flux enhancement increases to 100 and 1000, the electron irradiation dominates the deep charging characteristic. This provides theoretical guidance for the methods of discharge containment in SADAs.

中文翻译：

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电子辐照和工作电压对太阳能电池阵列驱动组件深电介质充电特性的耦合效应

基于双极电荷传输过程，建立了电子辐照和工作电压耦合作用下太阳能电池阵列驱动组件（SADA）的深介质充电模型。模拟分析了三种不同工况下SADA中空间电荷、电位和电场的分布情况，即内部充电通量模型（FLUMIC）谱电子辐照单独作用；工作电压单独作用；电子辐照和工作电压耦合。研究了电子通量增强、电子方向和工作电压对充电性能的影响。在这些调查的基础上，指出了排放风险和位置。在从端面入射的电子单独作用的情况下， 当通量增强超过100时为⁸ V/m。当工作电压单独作用时，只要工作电压低于8772 V ，最大电场不会超过10 ⁷ V/m。在典型光谱下，最大电场在耦合效应随着工作电压的增加而线性增加。当电子通量增强增加到 100 和 1000 时，电子辐照主导了深充电特性。这为 SADA 中的排放控制方法提供了理论指导。