Nonlinear nature of kinetic undamped waves induced by electrostatic turbulence in stimulated Raman backscattering

Alain Ghizzo; Daniele Del Sarto

doi:10.1140/epjd/e2014-50116-5

2021 Impact factor 1.611

Atomic, Molecular, Optical and Plasma Physics

Topical issue: Theory and Applications of the Vlasov Equation. Guest editors: Francesco Pegoraro, Francesco Califano, Giovanni Manfredi and Philip J. Morrison

Eur. Phys. J. D (2014) 68: 275
https://doi.org/10.1140/epjd/e2014-50116-5

Regular Article

Nonlinear nature of kinetic undamped waves induced by electrostatic turbulence in stimulated Raman backscattering^*

Alain Ghizzo^a and Daniele Del Sarto

Institut Jean Lamour-UMR 7168, University of Lorraine, BP 239, 54506 Vandoeuvre les Nancy, France

^a e-mail: alain.ghizzo@univ-lorraine.fr

Received: 11 February 2014
Received in final form: 22 April 2014
Published online: 1 October 2014

Abstract

The influence of low-frequency waves of kinetic nature induced by electron trapping in backward Stimulated Raman Scattering (SRS) is investigated. Semi-lagrangian Vlasov-Maxwell simulations are carried out not only for periodic boundary conditions but also in the case of an open plasma with parabolic shape, in optical mixing. We provide a numerical example of generation of KEEN (kinetic electrostatic electron nonlinear) waves nonlinearly induced from the SRS through a mechanism we first here elucidate. In particular we identify a process of backward scattering of the SRS probe light from the so generated KEEN waves, which may provide a mechanism for the possible experimental observation and measurement of such nonlinear structures.

Contribution to the Topical Issue “Theory and Applications of the Vlasov Equation”, edited by Francesco Pegoraro, Francesco Califano, Giovanni Manfredi and Philip J. Morrison.

© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2014