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介绍了航天器内部充电的基本物理机制,重点研究了质子在内部充电中的作用.用蒙特卡罗方法模拟质子在介质中的输运过程,计算了简化的平板介质在一定通量的粒子环境中的内部充电情况.结果表明,介质内部最大电场与入射质子能量有关,当质子能量达到14MeV时候,内部电场最强;当质子与电子的入射数目相同,并且材料参数一样时,质子产生的最大电场大于电子产生的最大电场.选取2004年7月26日TC-2卫星姿控分系统故障前的质子和电子通量数据,分别计算了二者可能引起的内部最大电场.计算结果表明,质子产生的最大电场比电子产生的最大电场小2～4个数量级,并且远小于击穿电场;在某些极端情况下,例如质子产生的电场和电子产生的电场方向一致的时候,电场的叠加会使局地电场得到加强.
The basic physical mechanism of the internal charge of spacecraft is introduced, and the role of proton in internal charging is mainly studied.The Monte Carlo method is used to simulate the transport process of proton in the medium, and the simplified plate medium is calculated in a certain flux particle environment The results show that the maximum internal electric field in the medium is related to the incident proton energy. When the proton energy reaches 14 MeV, the internal electric field is strongest. When the number of proton and electron incident is the same and the material parameters are the same, the maximum proton generation The electric field is greater than the maximum electric field generated by the electron.Selecting the data of proton and electron flux before the fault of TC-2 satellite attitude-controlled subsystem on July 26, 2004, the maximum internal electric field caused by the two can be calculated respectively.The calculation results show that proton The maximum electric field generated is 2 to 4 orders of magnitude smaller than the maximum electric field generated by the electron and far less than the breakdown electric field. In some extreme cases, for example, when the electric field generated by a proton and the electric field generated by an electron are in the same direction, Local electric field has been strengthened.