Demonstrating the saturation of stimulated Brillouin scattering by ion acoustic decay using fully kinetic simulations

Chapman, T.; Winjum, B. J.; Brunner, S.; Berger, R. L.; Banks, J. W.

doi:10.1063/1.4930131

Title: Demonstrating the saturation of stimulated Brillouin scattering by ion acoustic decay using fully kinetic simulations

Journal Article · Tue Sep 01 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4930131· OSTI ID:1234579

Chapman, T. ^[1];

^[2]; Brunner, S. ^[3]; Berger, R. L. ^[1]; Banks, J. W. ^[4]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering
Ecole Polytechnique Federale Lausanne (Switzlerland). Centre de Recherche en Physique des Plasma (CRPP)
Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Mathematical Sciences

The saturation of stimulated Brillouin scattering (SBS) by the decay to turbulence of the ion acoustic wave (IAW) that participates in the three-wave SBS interaction is demonstrated using a quasi-noiseless one-dimensional numerical solution to the Vlasov-Maxwell system of equations. This simulation technique permits careful examination of the decay process and its role in the complex evolution of SBS. Here, the IAW decay process is shown to be an effective SBS saturation mechanism. In our example, the instantaneous plasma reflectivity saturates at ~30% and drops to ~0% as a direct consequence of IAW decay. A contrasting example where the reflectivity is controlled by dephasing due to the nonlinear frequency of the IAW is also discussed.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344; NA0001833; FC02-04ER54789

OSTI ID:: 1234579

Alternate ID(s):: OSTI ID: 1229670

Report Number(s):: LLNL-JRNL-667961

Journal Information:: Physics of Plasmas, Vol. 22, Issue 9; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Title: Demonstrating the saturation of stimulated Brillouin scattering by ion acoustic decay using fully kinetic simulations

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