Dielectric permittivity of dusty plasma in the Earth's mesosphere

作     者：Hui Li Jian Wu Hui Li;Jian Wu

作者机构：National Key Laboratory of Electromagnetic Environment(LEME)China Research Institute of Radio Wave PropagationQingdao 266109China 

出 版 物：《Earth and Planetary Physics》 (地球与行星物理（英文版）)

年 卷 期：2021年第5卷第1期

页      面：117-120页

核心收录：

学科分类：07[理学] 070802[理学-空间物理学] 0708[理学-地球物理学] 

基　　金：the National Natural Science Foundation of China(NSFC)with grant No.61601419. 

主　　题：dusty plasma dielectric permittivity polar summer mesosphere 

摘      要：This paper deals with the dielectric permittivity of dusty plasma in the earth’s mesosphere.We give expressions for the complex dielectric permittivity of dusty plasma,taking into account the effects of the dust charging process and magnetic field.We discuss the dielectric permittivity of dusty plasma in several cases,such as high frequency approximation,parallel propagation in MF/HF band,and effects of plasma movement.Finally,the expressions are employed to study the phenomenon of radar echoes from the polar summer mesosphere.We report that dielectric permittivity caused by the dust charging process gives a radar cross section proportional to ω–4 and produces a number density of charged dust that agrees with measurements of mesopheric radar echoes.