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

G. Raj, B. Ersfeld, G. Vieux, S. Yoffe, Min Sup Hur, R. A. Cairns, D. A. Jaroszynski

Research output: Contribution to journalArticle

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86 Downloads (Pure)

Abstract

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.
Original languageEnglish
Article number103026
Number of pages11
JournalNew Journal of Physics
Volume17
Early online date14 Oct 2015
DOIs
Publication statusPublished - 14 Oct 2015

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plasma waves
backscattering
saturation
pulses
lasers
seeds
counters
phase shift
amplifiers
fusion
nonlinearity
pumps
harmonics

Keywords

  • raman backscattering
  • saturation
  • plasma waves
  • mode coupling

Cite this

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Raman backscattering saturation due to coupling between ωp and 2ωp modes in plasma. / Raj, G.; Ersfeld, B.; Vieux, G.; Yoffe, S.; Hur, Min Sup; Cairns, R. A.; Jaroszynski, D. A.

In: New Journal of Physics, Vol. 17, 103026, 14.10.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Raman backscattering saturation due to coupling between ωp and 2ωp modes in plasma

AU - Raj, G.

AU - Ersfeld, B.

AU - Vieux, G.

AU - Yoffe, S.

AU - Hur, Min Sup

AU - Cairns, R. A.

AU - Jaroszynski, D. A.

PY - 2015/10/14

Y1 - 2015/10/14

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AB - 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.

KW - raman backscattering

KW - saturation

KW - plasma waves

KW - mode coupling

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DO - 10.1088/1367-2630/17/10/103026

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