Laser{endash}plasma interactions in ignition-scale hohlraum plasmas

Journal Article · Wed May 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872000· OSTI ID:280179

MacGowan, B J; Afeyan, B B; Back, C A; Berger, R L; Bonnaud, G; Casanova, M; Cohen, B I; Desenne, D E; DuBois, D F; Dulieu, A G; Estabrook, K G; Fernandez, J C; Glenzer, S H; Hinkel, D E; Kaiser, T B; Kalantar, D H; Kauffman, R L; Kirkwood, R K; Kruer, W L; Langdon, A B ; Lasinski, B F; Montgomery, D S; Moody, J D; Munro, D H; Powers, L V; Rose, H A; Rousseaux, C; Turner, R E; Wilde, B H; Wilks, S C; Williams, E A ^[1]

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1. Lawrence Livermore National Laboratory, University of California, L-473, P.O. Box 808, Livermore, California 94550 (United States)

Scattering of laser light by stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) is a concern for indirect drive inertial confinement fusion (ICF). The hohlraum designs for the National Ignition Facility (NIF) raise particular concerns due to the large scale and homogeneity of the plasmas within them. Experiments at Nova have studied laser{endash}plasma interactions within large scale length plasmas that mimic many of the characteristics of the NIF hohlraum plasmas. Filamentation and scattering of laser light by SBS and SRS have been investigated as a function of beam smoothing and plasma conditions. Narrowly collimated SRS backscatter has been observed from low density, low-{ital Z}, plasmas, which are representative of the plasma filling most of the NIF hohlraum. SBS backscatter is found to occur in the high-{ital Z} plasma of gold ablated from the wall. Both SBS and SRS are observed to be at acceptable levels in experiments using smoothing by spectral dispersion (SSD). {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Lawrence Livermore National Laboratory
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 280179
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BACKSCATTERING
BEAM-PLASMA SYSTEMS
BRILLOUIN EFFECT
ICF DEVICES
LASER FUSION REACTORS
LASER-PRODUCED PLASMA
LASER-RADIATION HEATING
NOVA FACILITY
RAMAN EFFECT