Stimulated Brillouin Scattering in Multispecies Laser-Produced Plasmas

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.1278· OSTI ID:286980

Young, P E; Foord, M E ^[1]; Maximov, A V; Rozmus, W ^[2]

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1. Lawrence Livermore National Laboratory, University of California, P.O. Box 808, Livermore, California 94551 (United States)
2. 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 Laboratory
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 286980
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 7 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ASYMMETRY
BRILLOUIN EFFECT
CARBON
GROWTH
INSTABILITY
LASER-PRODUCED PLASMA
LIGHT SCATTERING
METHYLENE RADICALS
POLYPROPYLENE
SATURATION
SIMULATION
SPECTRA
STIMULATION