skip to main content

DOE PAGESDOE PAGES

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

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.
Authors:
 [1] ; ORCiD logo [2] ;  [3] ;  [1] ;  [4]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering
  3. Ecole Polytechnique Federale Lausanne (Switzlerland). Centre de Recherche en Physique des Plasma (CRPP)
  4. Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Mathematical Sciences
Publication Date:
Report Number(s):
LLNL-JRNL-667961
Journal ID: ISSN 1070-664X
Grant/Contract Number:
AC52-07NA27344; NA0001833; FC02-04ER54789
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 9; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; Electrostatic waves; Stimulated Brillouin scattering; Reflectivity; Maxwell equations; Light scattering
OSTI Identifier:
1234579
Alternate Identifier(s):
OSTI ID: 1229670

Chapman, T., Winjum, B. J., Brunner, S., Berger, R. L., and Banks, J. W.. Demonstrating the saturation of stimulated Brillouin scattering by ion acoustic decay using fully kinetic simulations. United States: N. p., Web. doi:10.1063/1.4930131.
Chapman, T., Winjum, B. J., Brunner, S., Berger, R. L., & Banks, J. W.. Demonstrating the saturation of stimulated Brillouin scattering by ion acoustic decay using fully kinetic simulations. United States. doi:10.1063/1.4930131.
Chapman, T., Winjum, B. J., Brunner, S., Berger, R. L., and Banks, J. W.. 2015. "Demonstrating the saturation of stimulated Brillouin scattering by ion acoustic decay using fully kinetic simulations". United States. doi:10.1063/1.4930131. https://www.osti.gov/servlets/purl/1234579.
@article{osti_1234579,
title = {Demonstrating the saturation of stimulated Brillouin scattering by ion acoustic decay using fully kinetic simulations},
author = {Chapman, T. and Winjum, B. J. and Brunner, S. and Berger, R. L. and Banks, J. W.},
abstractNote = {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.},
doi = {10.1063/1.4930131},
journal = {Physics of Plasmas},
number = 9,
volume = 22,
place = {United States},
year = {2015},
month = {9}
}