早期高空核电磁脉冲的自洽粒子模拟  

Self-Consistent Particle Simulation of Early-Time High Altitude Electromagnetic Pulse

作　　者：付梅艳 张茂钰[2] FU Mei-yan;ZHANG Mao-yu(School of Mathematical Sciences,Peking Universtiry,Beijing 100871,China;Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]北京大学数学科学院,北京100871 [2]西北核技术研究所,西安710024

出　　处：《现代应用物理》2018年第2期54-59,共6页Modern Applied Physics

基　　金：国家自然科学基金重点资助项目(61231003)

摘　　要：采用全电磁粒子模拟方法和一维近似模型,考虑电磁脉冲场对康普顿电子运动的影响,数值模拟了早期高空核电磁脉冲产生的自洽过程。给出了理论模型和计算模型,选取了一个计算区域位于源区的算例,比对了自洽处理方法和非自洽处理方法的异同,给出了三个考察点上电场分量的时域波形。结果表明,自洽处理方法会使第1峰值电场强度稍有降低,但对第2和第3峰值电场强度影响不大;同时,自洽处理方法会使第1与第2峰值电场强度之间的时间间隔缩短,但对以后各个峰值电场强度之间的时间间隔影响不大。By using particle-in-cell method and one dimensional approximation model,a self-consistent method is introduced to simulate the generation process of early-time high altitude electromagnetic pulse(E1-HEMP),in which both the geomagnetic field and the E1-HEMP are considered in computing Compton electron’s movement.An example with the calculation area locates inγsource region is given,and the waveforms of electric field components from the self-consistent code and the non-self-consistent code at three test points are obtained.By comparison,it is found that the self-consistent method will slightly reduce the first peak electric field strength and shorten the time interval between the first and the second peaks,but has little effect on the second and third peak electric field strengthes and the time intervals between other adjacent peaks.

关 键 词：早期高空核电磁脉冲 全电磁粒子模拟方法 自洽 

分 类 号：TN011[电子电信—物理电子学] O572[理学—粒子物理与原子核物理]