Modulational instability of an ultra-intense laser pulse in electron–positron plasmas

This paper investigates the modulational instability of a linearly polarized ultra-intense laser pulse propagating in electron–positron plasmas. Based on the wave equation, which contains vacuum polarization and magnetization effects, the nonlinear dispersion relation and the growth rate of instabil...

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Bibliographic Details
Published inJournal of plasma physics Vol. 79; no. 5; pp. 771 - 776
Main Authors HU, QIANG-LIN, XIAO, GUI-LAN, YU, XIAO-GUANG
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.10.2013
Subjects
Density
Electrons
Lasers
Plasma
Plasma physics
Positrons
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Summary:This paper investigates the modulational instability of a linearly polarized ultra-intense laser pulse propagating in electron–positron plasmas. Based on the wave equation, which contains vacuum polarization and magnetization effects, the nonlinear dispersion relation and the growth rate of instability are obtained and the effects of plasma number density and laser intensity on the growth rate are analyzed. Numerical results show that if the laser intensity is high enough, the modulational instability growth rate induced by vacuum polarization and magnetization nonlinearity can dominate the modulational instability growth rate induced by the nonlinearity associated with a relativistic effect and ponderomotive force.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0022-3778
1469-7807
DOI:10.1017/S0022377813000482