强激光与粒子束2017，Vol.29Issue(6)：16-20,5.DOI:10.11884/HPLPB201729.170046
时变等离子体高功率微波频率上转换的粒子模拟
Particle-in-cell simulation for frequency up-conversion of high-power microwave in time-varying plasma
摘要
Abstract
The frequency up-conversion of an electromagnetic wave in a time-varying plasma has been simulated in this paper with particle-in-cell (PIC) method,and it transformed a 2.45 GHz source radiation into a 130 GHz radiation with the power conversion efficiency of around 0.39 ％.We also studied the effects of the plasma parameters including the plasma density,the finite rise time of ionization and the width of plasma slab.It is concluded that the frequency up-conversion of the output wave was mainly affected by the plasma density,which was consistent with the theoretical results.In addition,the simulation showed that the energy of the output wave would be lager with the increase of the width of plasma slab,and the conversion efficiency of the output wave and spectrum were much better when the plasma rise time was shorter.A considerable 130 GHz radiation could be obtained with the plasma density of 2× 1020cm-3,the plasma thickness of 1 cm,and the plasma rise time of 0.04 ns.关键词
时变等离子体介质/频率上转换/粒子模拟/等离子体参数Key words
time-varying plasma medium/frequency up-conversion/particle-in-cell/plasma parameters分类
数理科学引用本文复制引用
高明珠,陈坤,常超,刘纯亮..时变等离子体高功率微波频率上转换的粒子模拟[J].强激光与粒子束,2017,29(6):16-20,5.基金项目
国家自然科学基金项目(51677145) （51677145）
