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Modification of stimulated Brillouin scattering due to magnetic anisotropy in laser–plasma interaction

Published online by Cambridge University Press:  09 March 2009

M. Khan
Affiliation:
Centre for Plasma Studies, Faculty of Science, Jadavpur University, Calcutta 700032, India
S. Sarkar
Affiliation:
Centre for Plasma Studies, Faculty of Science, Jadavpur University, Calcutta 700032, India
T. Desai
Affiliation:
Laser Fusion Programme, Centre for Advanced Technology, Indore 452013, India
H.C. Pant
Affiliation:
Laser Fusion Programme, Centre for Advanced Technology, Indore 452013, India

Abstract

Laser plasma experiments reveal rich interplay between laser plasma instabilities. The growth of stimulated Brillouin scattering (SBS) is one of the most significant constraints of laser fusion experiments. In this paper, a mechanism of stabilization of SBS process due to magnetic anisotropy has been presented. Magnetic anisotropy induced by the temporally exponentially growing nonoscillating magnetic moment from inverse Faraday effect (IFE) has been studied.It has been shown that for interaction of Nd laser (λ = 1.06 μm) on solid deuterium target the SBS growth rate (y) ∼ 3.45 ps and the phase velocities of the incident and scattered electromagnetic (EM) waves have been shown to decay exponentially (∼e∼λ1) in this SBS process resulting in wave-number mismatch.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1998

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