Effects of Higher-Order Relativistic Nonlinearity and Wakefield During a Moderately Intense Laser Pulse Propagation in a Plasma Channel

被引：3
|
作者：
Liu Ming-Ping [1 ,2 ]
Liu Bing-Bing [3 ]
Liu San-Qiu [3 ]
Zhang Fu-Yang [1 ]
Liu Jie [4 ]
机构：
[1] Nanchang Univ, Coll Informat Engn, Nanchang 330031, Peoples R China
[2] Beijing Normal Univ, Key Lab Beam Technol & Mat Modificat, Minist Educ, Beijing 100875, Peoples R China
[3] Nanchang Univ, Dept Phys, Nanchang 330047, Peoples R China
[4] Inst Appl Phys & Computat Math, Beijing 100088, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2013年 / 60卷 / 02期
基金：
中国国家自然科学基金;
关键词：
higher-order relativistic nonlinearity; laser wakefield; plasma channel; intense laser pulse; ACCELERATOR; BEAM;
D O I：
10.1088/0253-6102/60/2/14
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Using a variational approach, the propagation of a moderately intense laser pulse in a parabolic preformed plasma channel is investigated. The effects of higher-order relativistic nonlinearity (HRN) and wakefield are included. The effect of HRN serves as an additional defocusing mechanism and has the same order of magnitude in the spot size as that of the transverse wakefield (TWF). The effect of longitudinal wakefield is much larger than those of HRN and TWF for an intense laser pulse with the pulse length equaling the plasma wavelength. The catastrophic focusing of the laser spot size would be prevented in the present of ERN and then it varies with periodic focusing oscillations.
引用
收藏
页码：222 / 226
页数：5
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