Stimulated Brillouin Scattering in Multispecies Laser-Produced Plasmas
- Lawrence Livermore National Laboratory, University of California, P.O. Box 808, Livermore, California 94551 (United States)
- Department of Physics, Theoretical Physics Institute, University of Alberta, Edmonton, Alberta, T6G 2J1 (CANADA)
Growth and saturation of the stimulated Brillouin scattering (SBS) instability has been studied in C, CH, and CH{sub 2} laser-produced plasmas which have nearly identical density profiles. The backscattered reflectivity is highest for the CH{sub 2} plasma ({approximately}15{percent}) and up to {approximately}5 times lower for the pure carbon plasma. This result is explained by the stationary inhomogeneous theory of SBS and confirmed by numerical simulations provided one allows for the nonuniform expansion of hydrogen and carbon ions that leads to an axial asymmetry of the SBS gain and results in the observation of a blueshifted scattered light spectrum from CH targets. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 286980
- Journal Information:
- Physical Review Letters, Vol. 77, Issue 7; Other Information: PBD: Aug 1996
- Country of Publication:
- United States
- Language:
- English
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