Multibeam Stimulated Brillouin Scattering from Hot, Solid-Target Plasmas

Journal Article · Mon Oct 21 04:00:00 EDT 2002 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.89.175002· OSTI ID:804442

Seka, W ^[1]; Baldis, H A; Fuchs, J; Regan, S P; Meyerhofer, D D; Stoeckl, C; Yaakobi, B; Craxton, R S; Short, R W

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1. Laboratory for Laser Energetics, University of Rochester

We report on multibeam, laser-plasma interaction experiments with a critical density surface present at all times. These plasma conditions resemble the future direct-drive-ignition laser fusion plasmas. Six interaction beams are incident on a preformed plasma. Stimulated Brillouin scattering (SBS) shows strong evidence of electromagnetic wave seeding of side- and backscattering, with the latter being synergistiexecy enhanced by the former. The data are consistent with common, symmetriexecy located ion waves, although other interpretations cannot be ruled out. Quenching of SBS is observed before the peak intensity of the interaction beam is reached. For NIF direct-drive-ignition experiments, the expected SBS scattering levels remain well below 1%.

• Research Organization: Laboratory for Laser Energetics, University of Rochester, Rochester, NY (US)
• Sponsoring Organization: (US)
• DOE Contract Number: FC03-92SF19460
• OSTI ID: 804442
• Report Number(s): DOE/SF-19460-460; 1324; 101-103
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 89
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BACKSCATTERING
BRILLOUIN EFFECT
DIRECT DRIVE ICF
ELECTROMAGNETIC RADIATION
ION WAVES
LASERS
OAK:B202...MULTIBEAM STIMULATED BRILLOUIN SCATTERING FROM HOT
SOLID-TARGET PLASMAS
PLASMA
QUENCHING