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

Abstract

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.}

Authors:
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  1. Lawrence Livermore National Laboratory, University of California, L-473, P.O. Box 808, Livermore, California 94550 (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
280179
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 3; Journal Issue: 5; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; ICF DEVICES; LASER-RADIATION HEATING; LASER FUSION REACTORS; NOVA FACILITY; BEAM-PLASMA SYSTEMS; LASER-PRODUCED PLASMA; BRILLOUIN EFFECT; RAMAN EFFECT; BACKSCATTERING

Citation Formats

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, and Williams, E A. Laser{endash}plasma interactions in ignition-scale hohlraum plasmas. United States: N. p., 1996. Web. doi:10.1063/1.872000.
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. Laser{endash}plasma interactions in ignition-scale hohlraum plasmas. United States. doi:10.1063/1.872000.
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, and Williams, E A. Wed . "Laser{endash}plasma interactions in ignition-scale hohlraum plasmas". United States. doi:10.1063/1.872000.
@article{osti_280179,
title = {Laser{endash}plasma interactions in ignition-scale hohlraum plasmas},
author = {MacGowan, B J and Afeyan, B B and Back, C A and Berger, R L and Bonnaud, G and Casanova, M and Cohen, B I and Desenne, D E and DuBois, D F and Dulieu, A G and Estabrook, K G and Fernandez, J C and Glenzer, S H and Hinkel, D E and Kaiser, T B and Kalantar, D H and Kauffman, R L and Kirkwood, R K and Kruer, W L and Langdon, A B and Lasinski, B F and Montgomery, D S and Moody, J D and Munro, D H and Powers, L V and Rose, H A and Rousseaux, C and Turner, R E and Wilde, B H and Wilks, S C and Williams, E A},
abstractNote = {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.}},
doi = {10.1063/1.872000},
journal = {Physics of Plasmas},
number = 5,
volume = 3,
place = {United States},
year = {1996},
month = {5}
}