磁化等离子体非相干散射理论谱中的共振线研究  

Study on resonance lines in incoherent scattering theory spectrum of magnetized plasma

作　　者：梁宇 赵必强[1,2,3,4] 郝红连[1,3,4] 丁锋 曾令旗 乐新安[1,2,3,4] 宁百齐 LIANG Yu;ZHAO BiQiang;HAO HongLian;DING Feng;ZENG LingQi;YUE XinAn;NING BaiQi(Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Institutions of Earth Science,Chinese Academy of Sciences,Beijing 100029,China;Beijing National Observatory for Space Environment,Beijing 100029,China)

机构地区：[1]地球与行星物理重点实验室,中国科学院地质与地球物理研究所,北京100029 [2]中国科学院大学地球与行星科学学院,北京100049 [3]中国科学院地球科学研究院,北京100029 [4]北京空间环境国家野外科学观测研究站,北京100029

出　　处：《地球物理学报》2020年第12期4291-4299,共9页Chinese Journal of Geophysics

基　　金：国家重大科研仪器研制项目(41427901);创新群体(41621063);国家自然科学基金面上项目(41674148);子午工程资助.

摘　　要：本文对磁化等离子体非相干散射理论谱下的共振线进行了研究,简要介绍了等离子体线和回旋线的色散关系,并通过理论分析给出了二次回旋谐频处等离子体线分裂现象的色散关系.结合三亚非相干散射雷达(Sanya Incoherent Scatter Radar,SYISR)实际参数,对回旋线以及低频振荡、高频共振进行了分析讨论.分析后认为:SYISR拥有观测夜间200 km以下和400 km以上回旋线的可能性;在白天仅存在观测到H+振荡谱线的可能性;若观测数据足够良好,将可以观测到二次以及三次回旋谐频处的等离子体线分裂现象.In this paper,the resonance lines under the incoherent scattering spectrum of magnetized plasma are studied,and the dispersion relation of plasma line and gyro line are briefly introduced.The dispersion relation of plasma line splitting phenomenon at the second cyclotron harmonic frequency is obtained by theoretical analysis.Combined with the actual parameters of Sanya Incoherent Scatter Radar(SYISR),the gyro line,low-frequency oscillation and high-frequency resonance are analyzed and discussed.After analysis,it is concluded that SYISR has the possibility of observing the gyro line below 200km and above 400 km at night.There is only the possibility of observing H+oscillatory line in the daytime.If the observed data are good enough,the plasma line splitting at the secondary and tertiary cyclotron harmonic frequency can be observed.

关 键 词：非相干散射理论谱 磁化等离子体 共振线 

分 类 号：P352[天文地球—空间物理学]