超强线极化激光在e-p等离子体中传播的成丝不稳定性  

Filamentation instability of ultra-intense linearly polarized laser pulse in electron-positron plasmas

作　　者：胡强林[1] 肖桂兰[2] 余晓光[1] 罗小兵[1] 

机构地区：[1]井冈山大学数理学院,江西吉安343009 [2]井冈山大学图书馆,江西吉安343009

出　　处：《强激光与粒子束》2014年第1期124-128,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11064005);江西省自然科学基金项目(2010GQW0030);江西省原子与分子物理重点学科项目(2011-2015)

摘　　要：基于超强线极化激光在正负电子对(e-p)等离子体中的传播方程,讨论了相互作用过程中的成丝不稳定性。得到了电磁波的非线性色散关系和不稳定性增长率,并讨论了传播过程中激光强度和等离子体温度对成丝不稳定性的影响。结果表明,成丝不稳定性的强弱主要由相互作用的非线性效应与受有质动力作用后等离子体密度的减小之间的竞争所决定。Based on the wave equation of ultra-intense linearly polarized laser pulse propagating in electron-positron plasmas,the filamentation instability was investigated.The nonlinear dispersion relation and the growth rate of instability were derived.The effects of temperature and laser intensity on the growth rate were analyzed.The results show that in an electron-positron plasma,the intensity of the filamentation instability is mainly determined by the competition between the nonlinearity in the interaction and the relativistic light ponderomotive driven density responses.

关 键 词：e-p等离子体 线极化激光 波动方程 色散关系 成丝不稳定性 

分 类 号：O536[理学—等离子体物理]