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

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.