碰撞非相干散射理论谱宏观法和微观法的比较研究  

Comparative study on macroscopic and microscopic methods of collisional incoherent scatter spectra

作　　者：梁宇 赵必强[1,2,3,4] 乐新安[1,2,3,4] 丁锋 曾令旗[1,3,4] 郝红连 宁百齐[1,3,4] 万卫星 LIANG Yu;ZHAO BiQiang;YUE XinAn;DING Feng;ZENG LingQi;HAO HongLian;Ning BaiQi;WAN WeiXing(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;Innovation Academy for 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2期387-393,共7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：非相干散射理论谱是理解非相干散射雷达探测的理论基础,其求解过程分为微观法和宏观法.在考虑碰撞不考虑磁场的条件下,本文使用这两种方法对理论谱分别进行求解,给出了关键求解过程,并对等离子体的归一化导纳和极化率以及非相干散射的微分散射截面和谱密度函数进行分析,得到了它们各自之间的数学关系,概括性分析了两种方法在理论选择、最终结论及多种因素下求解的异同点.The theoretical spectrum of incoherent scattering is the theoretical basis for understanding the detection of incoherent scatter radar.The solution process can be summarized into the microscopic method based on the work of Hagfors(1961)and the macroscopic method based on the framework of Farley(1960).In this paper,the above two methods are used to solve the theoretical spectrum of collisional non-magnetized plasmas,separately.The normalized admittance and polarizability of plasma and the differential scattering cross section and spectral density function of incoherent scattering are analyzed,and the mathematical relationships between them are obtained.A general analysis of the similarities and differences between the two methods in the theoretical choice,the final conclusion and a variety of factors are given.

关 键 词：非相干散射谱 微分散射截面 谱密度函数 

分 类 号：P352[天文地球—空间物理学]