空间磁化等离子体非线性受激电磁辐射进展  

Recent progress of stimulated electromagnetic emissions in space magnetized plasmas

作　　者：付海洋[1] FU Haiyang(Key Laboratory for Information Science of Electromagnetic Waves,Fudan University,Shanghai 200433,China)

机构地区：[1]复旦大学电磁波信息科学教育部重点实验室,上海200433

出　　处：《电波科学学报》2021年第1期1-11,共11页Chinese Journal of Radio Science

基　　金：上海市自然科学基金(19ZR1403900);国家自然科学面上基金(4207040290)。

摘　　要：电磁波和磁化等离子体的非线性相互作用复杂,高功率电磁波调控电离层实验提供了研究非线性基本问题的主动方式.为构建空间磁化等离子体受激电磁辐射(stimulated electromagnetic emissions,SEEs)体系,本文首先总结了磁化等离子体中可能发生的参量不稳定性;其次,回顾了近十年国际电离层加热激发SEEs取得的进展,主要包括对受激布里渊散射、受激伯恩斯坦波散射、二次谐波激发进行总结;再次,围绕空间SEEs应用,分析了其与人工等离子体层、多尺度等离子体不规则体、能量转化波粒和波波相互作用、低频波激发等四方面的关系;最后,给出未来的发展方向和潜在应用的一些思考.Nonlinear interaction of high-power electromagnetic waves and magnetized plasmas produces a plethora of fundamental phenomena that can be exploited for powerful diagnostics of the earth’s ionospheric plasma.To establish a unified theory of magnetized stimulated electromagnetic emissions(SEEs)in space,we summarize possible parametric decay instabilities in magnetized plasmas.Then,we review the most recent progress of stimulated electromagnetic emissions during ionospheric modification experiments for the past decades.Important associated phenomena with SEEs are detailed outlined,including artificial ionization layer,multiple-scales plasma irregularities,wave-particle and wave-wave interaction mechanism,and low frequency EM wave generation.Finally,challenges and future will be discussed.

关 键 词：高功率电磁波 电离层加热 磁化等离子体 非线性效应 受激电磁辐射(SEEs) 

分 类 号：O53[理学—等离子体物理]