Dielectric permittivity of dusty plasma in the Earth's mesosphere  

作　　者：Hui Li Jian Wu 

机构地区：[1]National Key Laboratory of Electromagnetic Environment(LEME),China Research Institute of Radio Wave Propagation,Qingdao 266109,China

出　　处：《Earth and Planetary Physics》2021年第1期117-120,共4页地球与行星物理（英文版）

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

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.

关 键 词：dusty plasma dielectric permittivity polar summer mesosphere 

分 类 号：P354[天文地球—空间物理学]