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由于低地球轨道(LEO)空间中存在等离子体,会造成航天器表面的绝对电位不同,在空间站对接等过程中容易产生静电放电,从而影响航天器的正常运行。为了更准确的研究低地球轨道高度上等离子体对航天器表面电位的影响,本文采用微波电子回旋共振(ECR)等离子体源模拟了空间等离子体,运用静电探针法获取了等离子体的伏安特性曲线,并分析了气流量和微波源功率对电子密度的影响,对模拟分析不同轨道高度空间等离子体对航天器电位影响有重要意义。
Due to the presence of plasma in low Earth orbit (LEO) space, the absolute potential of the surface of the spacecraft will be different. Electrostatic discharge easily occurs during docking of the space station, which will affect the normal operation of the spacecraft. In order to study the effect of plasmas on the surface potential of spacecraft at low Earth orbit height more accurately, the space plasma was simulated by microwave plasma cyclotron resonance (ECR) plasma source, and the voltammogram of plasma was obtained by electrostatic probe The influence of gas flow rate and power of microwave source on the electron density is analyzed. It is of great significance to simulate the influence of altitude plasma on the spacecraft potential.