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.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
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)
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
electron-positron plasmas
linearly polarized laser
wave equation
dispersion relation
filamentation instability
