高空电磁脉冲环境计算中的自洽方法

计算物理 ›› 2017, Vol. 34 ›› Issue (4): 403-408.

高空电磁脉冲环境计算中的自洽方法

程引会, 李进玺, 马良, 郭景海, 赵墨, 吴伟

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

收稿日期:2016-04-20 修回日期:2016-09-28 出版日期:2017-07-25 发布日期:2017-07-25
作者简介:程引会(1967-),男,博士,高级工程师,主要从事电磁脉冲效应研究,E-mail:chengyh21@sohu.com
基金资助:
国防预研基金（51311060302）资助项目

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

CHENG Yinhui, LI Jinxi, MA Liang, GUO Jinghai, ZHAO Mo, WU Wei

Northwest Institute of Nuclear Technology, State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Xi'an 710024, China

Received:2016-04-20 Revised:2016-09-28 Online:2017-07-25 Published:2017-07-25

摘要/Abstract

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.

关键词: 高空核爆, 电磁脉冲, 数值模拟, 自洽

Abstract: 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.

Key words: high-altitude nuclear explosions, electromagnetic pulse, numerical simulation, self-consistent

中图分类号:

O441.2

程引会, 李进玺, 马良, 郭景海, 赵墨, 吴伟. 高空电磁脉冲环境计算中的自洽方法[J]. 计算物理, 2017, 34(4): 403-408.

CHENG Yinhui, LI Jinxi, MA Liang, GUO Jinghai, ZHAO Mo, WU Wei. Self-consistent Method in Calculation of High-altitude Electromagnetic Pulse Environment[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2017, 34(4): 403-408.

参考文献

[1] LONGMIRE C L, LONGLEY H J. Improvements in the treatment of Compton current and air conductivity in EMP problems[R]. DNA-3192T, Defense Nuclear Agency, 1973:1-31.
[2] LONGMIRE C L. Justification and verification of high-altitude EMP theory:Part I[R]. UCRL-15938. Lawrence Livermore National Laboratory, 1987:1-59.
[3] KARZAS W J, LATTER R. Electromagnetic radiation from a nuclear explosion in space[R]. Theoretical Note 27, 1961:1-8.
[4] KARZAS W J, LATTER R. Detection of the electromagnetic radiation from nuclear explosions in space[J]. Physics Reviews,1965,137(5B):1369-1378.
[5] ENG C D. Development of the time dependence of the nuclear(E1) HEMP electric field[J]. IEEE Transactions on Electromagnetic Compatibility, 2011,53(3):737-748.
[6] GILBERT J L, RADASKY W A. Study of non-equilibrium air chemistry[J]. IEEE Transactions on Electromagnetic Compatibility, 2013,55(3):446-450.
[7] MENG Cui. Numerical simulation of the HEMP environment[J]. IEEE Transactions on Electromagnetic Compatibility, 2013,55(3):440-455.
[8] FARMER W A, FRIEDMAN A. Effect of multiple scattering on the Compton recoil current generated in an EMP, revisited[J]. IEEE Transactions on Nuclear Science, 2015,62(4):1695-1706.
[9] HOLLAND R. Self-consistent atmospheric EMP coupling in three dimension[J]. IEEE Transaction on Nuclear Science, 1976,23(3):1283-1293.
[10] 乔登江. 核爆炸物理概论[M]. 北京:原子能出版社,1988:332-342.
[11] LONGMIRE C L. On the electromagnetic pulse produced by nuclear explosions[J]. IEEE Transactions on Electromagnetic Compatibility, 1978,20(1):3-13.
[12] LANGDON A B. Evolution of particle-in-cell plasma simulation[J]. IEEE Transactions on Plasma Science, 2014,42(5):1317-1320.
[13] DAWSON J M. Particle simulation of plasmas[J]. Reviews of Modern Physics, 1983, 55(2):403-447.
[14] BIRDSAL C K, LANGDON A B. Plasma physics via computer simulation[M]. New York:Adam Hilger, 1991:55-79.
[15] VERBONCOEUR J P. Particle simulation of plasmas:Review and advances[J]. Plasma Physics and Controlled Fusion, 2005,47(5A):231-260.