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研究高压太阳电池阵静电放电产生脉冲信号的特性,有助于深入了解太阳电池阵充放电形成机制。在试验中,利用电子枪模拟GEO空间带电环境,辐照太阳电池样品表面。利用电流探头CT-2、单极子天线和数字存储示波器测量静电放电所产生的脉冲电流、辐射电场并记录其波形。试验结果表明:太阳电池在静电放电过程中产生了脉冲宽度为几μs的瞬态电流,其峰值幅度为几A;辐射电场的脉冲信号持续时间几百ns至几个μs,其峰值幅度达数百V/m。脉冲信号的时域特征表现为脉冲群,其波形具有陡峭的前沿,能量分布的频率范围主要集中在0.1~50 MHz之间。最后根据上述研究对在轨静电放电测试仪的设计提出建议。
Studying the characteristics of the pulse signal generated by electrostatic discharge of high voltage solar array helps to understand the mechanism of charge and discharge of solar array. In the experiment, the GEO space charged environment was simulated using an electron gun to irradiate the solar cell sample surface. Using the current probe CT-2, the monopole antenna and the digital storage oscilloscope measure the pulse current generated by electrostatic discharge, radiate the electric field and record its waveform. The experimental results show that the solar cell generates a transient current with a pulse width of several μs during electrostatic discharge with a peak amplitude of several A. The pulse signal duration of the radiated electric field is several hundred ns to several μs with a peak amplitude of several One hundred V / m. The time-domain characteristics of the pulse signal appear as a burst, the waveform has a steep front, the energy distribution of the frequency range mainly concentrated in 0.1 ~ 50 MHz. Finally, based on the above research, we put forward some suggestions for the design of on-orbit electrostatic discharge tester.