脉冲波在空间等离子体介质中传播的矩分析及其应用

The moments analysis of the pulse propagation through plasma medium and its applications

根据随机介质波传播理论,开展脉冲波在星际空间等离子体介质中的传播特性的分析方法研究.在强起伏条件下,推导双频互相关函数的二阶矩和四阶矩方程,利用不同电子密度模型,计算双频衍射强度相关函数和闪烁指数,并应用到闪烁的动态谱观测和相关分析中,得到自相关图谱、相关带宽和相关时间等闪烁特征参数,为脉冲在等离子体中的传输特性的分析,提供必要的理论基础.

Based on the theory of wave propagation and scattering in random medium, the analysis method of the pulse propagating in the plasma medium is presented. Under the condition of strong fluctuations, we have deduced the two-frequency second moment and fourth moment equations, and calculated the two-frequency intensity correlation function and scintillation index in terms of the different electron density spectra. The statistical parameters of the self-correlation function, the correlation bandwidth and time are obtained, in order to provide a basis for studing the characteristic of the pulse propagation in plasma medium.