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Plasma channeling by multiple short-pulse lasers

Published online by Cambridge University Press:  23 January 2009

W. Yu ,
L. Cao ,
M.Y. Yu ,
H. Cai ,
H. Xu ,
X. Yang ,
A. Lei ,
K.A. Tanaka  and
R. Kodama
W. Yu
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou, China
L. Cao
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, China
M.Y. Yu
Affiliation:
Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou, China Institute for Theoretical Physics I, Ruhr University, Bochum, Germany
H. Cai
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, China Institute of Laser Engineering and Graduate School of Engineering, Osaka University, Osaka, Japan
H. Xu
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
X. Yang
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
A. Lei*
Affiliation:
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
K.A. Tanaka
Affiliation:
Institute of Laser Engineering and Graduate School of Engineering, Osaka University, Osaka, Japan
R. Kodama
Affiliation:
Institute of Laser Engineering and Graduate School of Engineering, Osaka University, Osaka, Japan
*
Address correspondence and reprint request to: Anle Lei, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China. E-mail: lal@siom.ac.cn
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Abstract

Channeling by a train of laser pulses into homogeneous and inhomogeneous plasmas is studied using particle-in-cell simulation. When the pulse duration and the interval between the successive pulses are appropriate, the laser pulse train can channel into the plasma deeper than a single long-pulse laser of similar peak intensity and total energy. The increased penetration distance can be attributed to the repeated actions of the ponderomotive force, the continuous between-pulse channel lengthening by the inertially evacuating ions, and the suppression of laser-driven plasma instabilities by the intermittent laser-energy cut-offs.

Keywords

Instability suppressionPlasma channelingPIC simulationShort-pulse laser
Type
Research Article
Information
Laser and Particle Beams , Volume 27 , Issue 1 , March 2009 , pp. 109 - 114
Copyright
Copyright © Cambridge University Press 2009

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