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Nonlinear backward Raman scattering in the short laser pulse interaction with a cold underdense transversely magnetized plasma

Published online by Cambridge University Press:  13 September 2011

Alireza Paknezhad  and
Davoud Dorranian
Alireza Paknezhad
Affiliation:
Laser Laboratory, Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
Davoud Dorranian*
Affiliation:
Laser Laboratory, Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
*
Address correspondence and reprint requests to: Davoud Dorranian, Laser Laboratory, Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Poonak, Hesarak, 14776 Tehran, Iran. E-mail: doran@srbiau.ac.ir
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Abstract

Raman backward scattering is investigated in the interaction of linearly polarized ultra short laser pulse with a homogenous cold underdense magnetized plasma by taking into account the relativistic effect and the effect of nonlinearity up to third order. The plasma is embedded in a uniform magnetic field perpendicular to both of propagation direction and electric vector of the radiation field. Nonlinear wave equation is set up and differential equations, which model the instability, are derived. Using of the Fourier transformation, analytical solutions are obtained for a set of physically relevant initial conditions and the temporal growth rate of instability is calculated. Results are significantly different in comparison with lower order computations. The growth rate of backward Raman scattering shows an increase due to the presence of external magnetic field as well as nonlinear effects.

Keywords

Growth ratMagnetized plasmaNonlinear effectPonderomotive forceRaman backward scatteringRelativistic effectUnderdense plasmaWakefield
Type
Research Article
Information
Laser and Particle Beams , Volume 29 , Issue 3 , September 2011 , pp. 373 - 380
Copyright
Copyright © Cambridge University Press 2011

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