Experimental basis for laser-plasma interactions in ignition hohlraums at the National Ignition Facility

Journal Article · Sat May 15 04:00:00 EDT 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3304474· OSTI ID:21371207

Froula, D H; Divol, L; London, R A; Berger, R L; Doeppner, T; Meezan, N B; Ralph, J; Ross, J S; Suter, L J; Glenzer, S H ^[1]

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1. L-399, Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States)

A series of laser-plasma interaction experiments is presented using gas-filled hohlraums that shed light on the behavior of stimulated Raman scattering and stimulated Brillouin scattering at various plasma conditions encountered in indirect drive ignition designs. Detailed experimental results are presented that quantify the density, temperature, and intensity thresholds for both of these instabilities. In addition to controlling plasma parameters, the National Ignition Campaign relies on optical beam smoothing techniques to mitigate backscatter and the results presented show that polarization smoothing is effective at controlling backscatter. These results provide an experimental basis for the forthcoming experiments on National Ignition Facility.

• OSTI ID: 21371207
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
BRILLOUIN EFFECT
COHERENT SCATTERING
INSTABILITY
LASER-PRODUCED PLASMA
LASERS
PLASMA
PLASMA INSTABILITY
RAMAN EFFECT
SCATTERING
US NATIONAL IGNITION FACILITY