Implementation of secondary emission in three dimensional PIC numerical simulation
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摘要: 探讨了电子撞击金属表面产生二次电子的理论，介绍了二次电子发射系数、非弹性背散射电子能量分布等重要物理参数的计算式。根据相关的理论及公式，编写了三维PIC数值模拟程序的二次发射模块, 建立相应的数值模型进行模拟。模拟所得的二次电子发射系数及非弹性背散射电子的能量分布等主要参数与理论值一致，验证了模拟过程的正确性。Abstract: The theory of secondary electrons produced by electrons impacting the metal surface was discussed. Formulas of some important physical parameters were summarized, including secondary electron emission coefficient, and inelastically backscattered electron energy distribution. Then the secondary emission module of three dimensional PIC numerical simulation program was written. The corresponding numerical model was established. The simulation results including secondary electron emission coefficient and inelastically backscattered electron energy distribution are consistent with the theoretical predictions, which verifies the correctness of the simulation process.
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