超强激光等离子体中的相对论性朗缪尔孤子  

Relativistic Langmuir solitons in ultrapowerful laser plasma

作　　者：刘笑兰[1] 李晓卿[2] 

机构地区：[1]南昌大学物理系,南昌330031 [2]南京师范大学物理系,南京210097

出　　处：《激光技术》2013年第5期627-630,共4页Laser Technology

基　　金：国家自然科学基金资助项目(11105066);中国科学技术部国际科技合作基金资助项目(2009DFA02320);江西省自然科学基金资助项目(20114BAB202006)

摘　　要：为了研究相对论性朗缪尔孤子的特性,对从动力论出发所获得的超强等离子体中相对论性强朗缪尔湍动控制方程组进行了理论分析。结果表明,随着电子的平均洛伦兹因子以及场的湍动参量增加,朗缪尔孤子的波包半宽变窄,孤子总能量和总动量相应地增大,且电子的相对论效应对孤子总能量和动量的非线性部分的影响远大于线性部分。该研究可为超强激光等离子体中相关的非线性现象提供新的理论参考。In order to study the characteristics of relativistic Langmuir solitons, the control equations of relativistic strong Langmuir turbulence in ultrapowerful laser plasma were obtained from momentum theory. And then, theoretical analysis was made. The research shows that half-width of wave-packet will become narrower and the total energy and momentum of solitons will become bigger with the increasing of average Lorentz factor of electrons and turbulence parameter of field. The relativistic effect of electrons affects the total energy and momentum of the solitons much larger in the nonlinear part than in the linear part. The results will provide the theoretical reference on the nonlinear phenomenon in uhrapowerful laser plasma.

关 键 词：非线性光学 激光等离子体 理论分析 相对论性朗缪尔湍动 孤子波包 

分 类 号：O533[理学—等离子体物理]