空间太阳阵表面静电放电特性实验研究

Experimental Simulation of Electrostatic Discharge Characteristics of Space Solar Arrays

空间太阳阵表面静电放电问题日益受到关注。本文利用电子束流辐照太阳阵样品,模拟表面静电放电过程,通过测量充电电压、放电电流以及放电次数,分析静电放电特性。实验表明,太阳阵表面充电静电能是产生静电放电的放电源,当太阳阵盖片表面充电电位相对于太阳阵结构超过阈值电压时产生静电放电,不同充电模式下太阳阵样品表面产生介质放电和金属放电。空间太阳阵表面静电放电特性与空间带电环境、太阳阵材料、结构以及温度等因素相关。

The electrostatic discharge characteristics of the space solar arrays were experimentally simulated. The resuits show that the discharge depends on the space environment, temperature, and materials of the solar array to a varying degree. The electrostatic discharge characteristics of the space solar array, irradiated with an electron beam, including the discharge voltage,discharge current, and discharge number, were measured. The measured results show that the electro- static energy, accumulated in charging the solar array, is responsible for the electrostatic discharge. When the charging voltage,across the cover-glass and solar array structure,exceeds the threshold voltage, the electrostatic discharge occurs, and depending on the different charging modes, the discharge on solar array surfaces can be either a dielectric or a metallic discharge.