用蒙特卡罗方法研究卫星内部带电问题

由高能电子引起的卫星内部带电，是危害地球同步轨道卫星主要的空间环境效应之一．内部带电的物理机制和相应的卫星设计规范研究，近年来受到国际空间界的高度重视．本文用蒙特卡罗方法，通过模拟高能电子对电介质轰击后在介质中产生电荷沉积，计算了轰击后电介质内部最大电场强度，并进而分析了电介质内部电场与电子能量、屏蔽厚度及介质厚度的关系．该结果对卫星设计有重要参考价值．

A STUDY ON SPACECRAFT INTERNAL CHARGING WITH MONTE CARLO METHOD

Dielectric internal charging caused by energetic electrons will cause anomalies in Geosynchronous satellites, so it is an important problem faced by satellite designer. In recent years, many statistical studies have been conducted in this area. In this paper, Monte Carlo method has been used to simulate the charge deposition in the dielectric caused by energetic electrons. The electric field in the dielectric was calculated as the function of injected electron energy, thickness of shielding and dielectric. It is found that the electric field induced by the deposited charges in the dielectric has significant correlation with these three factors.