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地球同步轨道航天器在地磁亚暴环境下处于向光面和背光面的两侧会产生电位差。本文利用高能电子和高能离子的双麦克斯韦分布拟合同步轨道环境等离子体并加入二次电子和光电子的影响,建立了航天器的三维计算模型,利用基于PIC(Particle In Cell)方法的仿真程序,计算了航天器表面各材料的充电电位及其附近的等离子体的电位分布,以及低能电子、高能电子、二次电子和光电子的密度分布和充电电流分布,最后探讨了航天器不同表面材料电势随时间的变化情况。
Geosynchronous orbital spacecraft in the geomagnetic sub-environment in the light to the side of the backlight and will have a potential difference. In this paper, we use the dual Maxwell distribution of high-energy electrons and high-energy ions to fit the orbital environment plasma and add the influence of secondary electrons and photoelectrons to establish a three-dimensional model of the spacecraft. Using the simulation program based on PIC (Particle In Cell) The charge potential of each material on the surface of the spacecraft and the plasma potential distribution around the spacecraft, as well as the density distribution and charge current distribution of the low-energy electrons, the high-energy electrons, the secondary electrons and the photoelectrons are calculated. Finally, the potential variations of the surface materials of the spacecraft Time changes.