Intense laser beam guiding in self-induced electron cavitation channel in underdense plasmas

被引：0
|
作者：
Cang, Yu [1 ]
Yu, Wei [1 ]
Wu, Hui-Chun [2 ]
Xu, Han [1 ]
Tian, You-Wei [1 ]
机构：
[1] State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
[2] Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
来源：
| 2007年 / Institute of Physics Publishing, Temple Back, Bristol, BS1 6BE, United Kingdom卷 / 16期
关键词：
Cavity resonators - Electron energy levels - Energy dissipation - Gaussian beams - Laser beam effects - Plasma density;
D O I：
10.1088/1009-1963/16/2/028
中图分类号：
学科分类号：
摘要：
In underdense plasmas, the transverse ponderomotive force of an intense laser beam with Gaussian transverse profile expels electrons radially, and it can lead to an electron cavitation. An improved cavitation model with charge conservation constraint is applied to the determination of the width of the electron cavity. The envelope equation for laser spot size derived by using source-dependent expansion method is extended to including the electron cavity. The condition for self-guiding is given and illuminated by an effective potential for the laser spot size. The effects of the laser power, plasma density and energy dissipation on the self-guiding condition are discussed. © 2007 Chin. Phys. Soc. and IOP Publishing Ltd.
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