Breaking of a Langmuir wave in cold electron-positron-ion plasmas  

作　　者：周素云 陈辉 李艳芳 

机构地区：[1]School of Material and Electromechanical Engineering, Jiangxi Science and Technology Normal University [2]Department of Physics, Nanchang University

出　　处：《Plasma Science and Technology》2018年第1期54-58,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos. 11665012 and 11247016);the Natural Science Foundation of Jiangxi Province, China (Nos. 2014ZBAB202001 and 2015ZBAB202006)

摘　　要：The space-time evolution of a given density perturbation in cold homogeneous electron- positron-ion plasma is investigated with an assumption of infinitely massive ions by employing a numerical calculation method. The phase-mixing time and wave-breaking time can be effectively distinguished with this method. It is found that an increase of the ratio of equilibrium ion density to equilibrium electron density can attenuate plasma oscillations, leading to a delay in wave breaking. The dependence of the phase-mixing and wave-breaking times on the amplitude of the initial perturbation is also discussed.The space-time evolution of a given density perturbation in cold homogeneous electron- positron-ion plasma is investigated with an assumption of infinitely massive ions by employing a numerical calculation method. The phase-mixing time and wave-breaking time can be effectively distinguished with this method. It is found that an increase of the ratio of equilibrium ion density to equilibrium electron density can attenuate plasma oscillations, leading to a delay in wave breaking. The dependence of the phase-mixing and wave-breaking times on the amplitude of the initial perturbation is also discussed.

关 键 词：e-p-i plasma phase-mixing time wave-breaking time 

分 类 号：TL[核科学技术]