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Laser beam self-focusing in collisional plasma with periodical density ripple

Published online by Cambridge University Press:  04 February 2020

Geng Zhang Open the ORCID record for Geng Zhang [Opens in a new window]  and
Xiongping Xia Open the ORCID record for Xiongping Xia [Opens in a new window]
Geng Zhang
Affiliation:
College of Science, Guilin University of Technology, Guilin541004, China
Xiongping Xia*
Affiliation:
College of Science, Guilin University of Technology, Guilin541004, China
*
Author for correspondence: X. Xia, College of Science, Guilin University of Technology, Guilin541004, China. E-mail: [email protected]
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Abstract

In the paper, we applied the paraxial region theory and Wentzel–-Kramers–-Brillouin approximation to study laser beam self-focusing in the interaction of laser and collisional plasma with periodical density ripple. The results have shown that, under the influence of collision nonlinear effect, laser presents stable self-focusing, self-defocusing, and oscillational self-focusing in the plasma. Besides, the parameters of plasma with periodical density ripple have a greater impact on the effect of self-defocusing and oscillational self-focusing than stable self-focusing. In certain conditions, beam self-defocusing and oscillational self-focusing would decline and even disappear, and stable self-focusing would further be strengthened. Hence, selecting a suitable periodic plasma system is advantageous for separating self-defocusing and oscillational self-focusing, and for the formation of a more stable collisional self-focusing.

Keywords

Collisional plasmadielectric functionelectron temperatureperiodical density rippleself-focusing
Type
Research Article
Information
Laser and Particle Beams , Volume 38 , Issue 1 , March 2020 , pp. 45 - 53
Copyright
Copyright © Cambridge University Press 2020

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