Suppression of stimulated Brillouin scattering by seeded ion wave mode coupling
- Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (United States)
- Laboratoire pour LUtilisation des Lasers Intenses, Centre National de la Recherche Scientifique, Ecole Polytechnique, 91128 Palaiseau Cedex (France)
Particle simulations and the analytical solution of coupled mode equations are used to demonstrate that the mode coupling of a primary ion acoustic wave produced by stimulated Brillouin backscatter with a secondary finite-amplitude ion wave propagating at a finite relative angle can reduce the amplitude of the primary ion wave and the backscatter. The simulations and analysis give results that are in qualitative agreement with experimental observations [Baldis {ital et al.}, Phys. Rev. Lett. {bold 77}, 2957 (1996)] of the partial suppression of stimulated Brillouin backscattering (SBBS) when there are simultaneous, overlapping SBBS processes at a finite relative angle, which may influence SBBS reflectivities in other current and future laser-fusion experiments with multiple overlapping beams. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 641533
- Journal Information:
- Physics of Plasmas, Vol. 5, Issue 9; Other Information: PBD: Sep 1998
- Country of Publication:
- United States
- Language:
- English
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