高空电磁脉冲环境计算中的自洽方法  

Self-consistent Method in Calculation of High-altitude Electromagnetic Pulse Environment

作　　者：程引会[1] 李进玺[1] 马良[1] 郭景海[1] 赵墨[1] 吴伟[1] 

机构地区：[1]西北核技术研究所强脉冲辐射模拟与效应国家重点实验室,西安710024

出　　处：《计算物理》2017年第4期403-408,共6页Chinese Journal of Computational Physics

基　　金：国防预研基金(51311060302)资助项目

摘　　要：高空电磁脉冲环境计算中包含自洽过程,康普顿电流既是产生电磁脉冲的源项,同时又受电场的影响.本文从一维模型出发,经过合理近似,推导出康普顿电流与本地电场之间的解析关系.利用等效电导率的概念,将该自洽过程加入到原有计算模型中.利用粒子模拟和时域有限差分方法,对推导出的康普顿电流和电场关系进行验证.最后给出一个考虑自洽过程的高空电磁脉冲算例.Modeling of high-altitude electromagnetic pulse （HEMP） consists of one self-consistent process. Current density produced by Compton effects of gamma rays not only is the source in Maxwell＇ s equation to produce electromagetic pulse, but also is influenced by electric fields. In this paper, analytical relation of Compton current and local electric field was deduced with reasonable hypotheses in one dimension model. It shows that self-consistent process is equivalent to an effective conductivity and can be combined with original non-self-consistent model. Analytical relation between Compton current and electric filed was verified using particle in cell and finite-difference time-domain methods. Finally, an example of HEMP environments calculated by this means was shown.

关 键 词：高空核爆 电磁脉冲 数值模拟 自洽 

分 类 号：O441.2[理学—电磁学]