A Numerical Fluid Analysis for Early Nonlinear Mode Evolution of Fast Electron Beams in Dense Plasmas  

作　　者：S.REHMAN 王晓钢 刘健 雷奕安 刘悦 

机构地区：[1]Laboratory of Materials Modification by Laser,Ion and Electron Beams,School of Physics & Optoelectronic Technology,Dalian University of Technology [2]State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University

出　　处：《Plasma Science and Technology》2009年第6期661-665,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.40731056,10778613,and 10575018);the National Basic Research Program of China(No.2008CB787103)

摘　　要：Nonlinear mode evolution for relativistic electrons in dense plasmas is analyzed in a three-dimensional fluid approach. Similar to the results previously obtained in particle-in-cell simulations, it is found that oblique modes dominate two-stream and filamentation modes in the linear stage. On the other hand a power spectrum analysis shows the nonlinear development of the high wavenumber modes.Nonlinear mode evolution for relativistic electrons in dense plasmas is analyzed in a three-dimensional fluid approach. Similar to the results previously obtained in particle-in-cell simulations, it is found that oblique modes dominate two-stream and filamentation modes in the linear stage. On the other hand a power spectrum analysis shows the nonlinear development of the high wavenumber modes.

关 键 词：relativistic electron beams power spectrum analysis INSTABILITIES 

分 类 号：O532.13[理学—等离子体物理]