Evolution of Small Scale Density Perturbations of Plasma and Charged Aerosol Particles in Polar Mesospheric Summer Echoes (PMSE) Layers  

作　　者：胡祖权 陈银华 郑聚高 刘昊 郁明阳 吴剑 

机构地区：[1]Key Laboratory of Basic Plasma Physics,Chinese Academy of Sciences,and Department of Modern Physics,University of Science and Technology of China [2]Institute for Fusion Theory and Simulation,Department of Physics,Zhejiang University [3]Institute für Theoretische Physik,Ruhr-Universitt Bochum [4]National Key Laboratory of Electromagnetic Environment,China Research Institute of Radiowave Propagation

出　　处：《Plasma Science and Technology》2011年第5期550-556,共7页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos. 40831062, 10775134);partially supported by CAS Knowledge Innovation Program (No. kjcx2-yw-n28);National Basic Research Program of China (Nos. 2008CB717800, 2009GB105001)

摘　　要：Time evolution of ionospheric D-region plasmas including the perturbations of electrons and charged aerosol particles is investigated under the conditions of polar mesosphere summer echoes （PMSE）. It is shown that the time scale of decay of the electron density is in the order of an hour under typical PMSE conditions, in the majority of cases, the electron density is anticorrelated to the ion density, except that the radius of aerosol particles is greater than 50 nm. Also, the evolutions under varied parameters, such as the amplitude and width of perturbation, the aerosol particle radius, and the altitude of the PMSE occurrence are investigated. The obtained results are useful for interpreting the experimental observations.Time evolution of ionospheric D-region plasmas including the perturbations of electrons and charged aerosol particles is investigated under the conditions of polar mesosphere summer echoes （PMSE）. It is shown that the time scale of decay of the electron density is in the order of an hour under typical PMSE conditions, in the majority of cases, the electron density is anticorrelated to the ion density, except that the radius of aerosol particles is greater than 50 nm. Also, the evolutions under varied parameters, such as the amplitude and width of perturbation, the aerosol particle radius, and the altitude of the PMSE occurrence are investigated. The obtained results are useful for interpreting the experimental observations.

关 键 词：PLASMA small scale structure charged aerosol particle EVOLUTION 

分 类 号：O539[理学—等离子体物理]