Comparisons between nonlinear kinetic modelings of simulated Raman scattering using envelope equations

Didier Bénisti, Nikolai A. Yampolsky, Nathaniel J. Fisch

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Abstract

In this paper, we compare two recent models [N. A. Yampolsky and N. J. Fisch, Phys. Plasmas 16, 072104 (2009); D. Bénisti, D. J. Strozzi, L. Gremillet, and O. Morice, Phys. Rev. Lett. 103, 155002 (2009)] introduced to predict the nonlinear growth of stimulated Raman scattering in the kinetic regime, and providing moreover a nonlinear description of the collisionless, Landau-like, damping rate of the driven electron plasma wave. We first recall the general theoretical framework common to these two models, based on the derivation of the imaginary part of the electron susceptibility, i, and then discuss in detail why the two approaches differ. By comparing the theoretical predictions for i to those derived from test particle or Vlasov simulations, we moreover discuss the range of validity of the two models.

Original languageEnglish (US)
Article number013110
JournalPhysics of Plasmas
Volume19
Issue number1
DOIs
StatePublished - Jan 1 2012

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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