Saturation process induced by vortex-merging in numerical Vlasov-Maxwell experiments of stimulated Raman backscattering

被引：34

作者：

Albrecht-Marc, M.

Ghizzo, A.

Johnston, T. W.

Reveille, T.

Del Sarto, D.

Bertrand, P.

机构：

[1] Univ Henri Poincare, LPMIA, UMR 7040, F-54506 Vandoeuvre Les Nancy, France

[2] INRS Energie & Mat, Varennes, PQ J3X 1S2, Canada

来源：

PHYSICS OF PLASMAS | 2007年 / 14卷 / 07期

关键词：

D O I：

10.1063/1.2749715

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The influence of low-frequency nonlinear Bernstein-Greene-Kruskal (BGK)-type waves induced by trapped electrons in backward stimulated Raman scattering is investigated in optical mixing. Semi-Lagrangian Vlasov-Maxwell simulations show two nonlinear behaviors. First, there is a Morales-O'Neil plasma wave frequency downshift retuned by a small wavenumber shift which maintains the Stimulated Raman Scattering (SRS) resonance. The saturation of Raman backscattering begins with phase space vortex merging followed by a transition to lower wavenumbers following the (nonlinear) dispersion relation, resembling weak turbulence.

引用

页数：15

共 38 条

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