Self-focusing of intense laser pulse propagating in underdense plasma

XIONG Han; LIU San-qiu; LIAO Jing-jing; LIU Xiao-lan

doi:10.3969/j.issn.1001-3806.2010.02.035

In order to study self-focusing phenomenon of an intense short laser beam propagating in cold, underdense plasma,the more complete ponderomotive force of laser beam propagating with implicate term and Lorenz term was used.Calculation show that the implicate term has stronger nonlinear effect on self-focusing.Meanwhile the relativistic effect should be considered when laser pulse becomes strong enough.Although the consideration of relativistic effect makes the system nonlinearity larger,it could decrease the nonlinear effect on self-focusing.This is different from the relativistic self-focusing of long laser pulse.

Self-focusing of intense laser pulse propagating in underdense plasma

Corresponding author: LIU San-qiu, sqliu@ncu.edu.cn;

1. Key Laboratory of Nondestructive Test (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China;

2. Department of Physies, Nanchang University, Nanchang 330031, China

Received Date: 2008-12-01

Accepted Date: 2009-03-06

Available Online: 2010-03-25

Abstract: In order to study self-focusing phenomenon of an intense short laser beam propagating in cold, underdense plasma,the more complete ponderomotive force of laser beam propagating with implicate term and Lorenz term was used.Calculation show that the implicate term has stronger nonlinear effect on self-focusing.Meanwhile the relativistic effect should be considered when laser pulse becomes strong enough.Although the consideration of relativistic effect makes the system nonlinearity larger,it could decrease the nonlinear effect on self-focusing.This is different from the relativistic self-focusing of long laser pulse.

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Reference (12)

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Self-focusing of intense laser pulse propagating in underdense plasma

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