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Effect of super-thermal ions and electrons on the modulation instability of a circularly polarized laser pulse in magnetized plasma

Published online by Cambridge University Press:  08 April 2015

R. Etemadpour  and
N. Sepehri Javan
R. Etemadpour*
Affiliation:
Laser Laboratory, Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
N. Sepehri Javan
Affiliation:
Department of physics, University of Mohaghegh Ardabili, Ardabil, Iran
*
Address correspondence and reprint requests to: R. Etemadpour, Laser Laboratory, Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran. E-mail: roshanak048@yahoo.com
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Abstract

The modulation instability of a circularly polarized laser pulse in a magnetized non-Maxwellian plasma is investigated. Based on a relativistic fluid model, the nonlinear interaction of an intense circularly polarized laser beam with a non-Maxwellian magnetized plasma is described. Nonlinear dispersion relation and growth rate of the instability for left- and right-hand polarizations are derived. The effect of temperature, external magnetic field, value of Kappa and state of polarization on the growth rate are analyzed. It is shown that the growth rate increases with increase in the magnetic field for the right-hand polarization and inversely it decreases for the left-hand one. Also it is observed that existence of super-thermal particles causes the decrease in the growth.

Keywords

Kappa distributionMagnetized plasmaModulation instabilityNonlinear wave equationNon-Maxwellian plasmaSuper-thermal
Type
Research Article
Information
Laser and Particle Beams , Volume 33 , Issue 2 , June 2015 , pp. 265 - 272
Copyright
Copyright © Cambridge University Press 2015 

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