Raman backscattering saturation due to coupling between ω p and 2 ω p modes in plasma

Raman backscattering (RBS) in plasma is the basis of plasma-based amplifiers and is important in laser-driven fusion experiments. We show that saturation can arise from nonlinearities due to coupling between the fundamental and harmonic plasma wave modes for sufficiently intense pump and seed pulses...

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Bibliographic Details
Published inNew journal of physics Vol. 17; no. 10; p. 103026
Main Authors Raj, G, Ersfeld, B, Vieux, G, Yoffe, S, Hur, Min Sup, Cairns, R A, Jaroszynski, D A
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 14.10.2015
Subjects
42.65.Dr
52.35.Mw
52.38.Kd
Backscattering
Coupling
Physics
Plasma waves
plasma-based amplifiers
Pulse propagation
Raman amplification in plasma
Saturation
saturation of parametric processes in plasma
Time dependent analysis
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Summary:Raman backscattering (RBS) in plasma is the basis of plasma-based amplifiers and is important in laser-driven fusion experiments. We show that saturation can arise from nonlinearities due to coupling between the fundamental and harmonic plasma wave modes for sufficiently intense pump and seed pulses. We present a time-dependent analysis that shows that plasma wave phase shifts reach a maximum close to wavebreaking. The study contributes to a new understanding of RBS saturation for counter-propagating laser pulses.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/17/10/103026