Observation of polarization dependent Raman scattering in a large scale plasma illuminated with multiple laser beams

Journal Article · Tue Aug 15 04:00:00 EDT 2006 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2215415· OSTI ID:20860196

Kirkwood, R K; Moody, J D; Niemann, C; Williams, E A; Langdon, A B; Landen, O L; Divol, L; Suter, L J; Depierreux, S; Seka, W ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

Experiments in plasmas produced with 2 mm diameter gas filled targets preheated with 10 kJ of laser energy have shown that the stimulated Raman scattering (SRS) of a high intensity, 351 nm, beam is affected by the presence of a second, counterpropagating, high intensity beam and that has its polarization aligned to the first when the plasma conditions are relevant to ignition by indirect drive. Separate experiments with the crossing beam's polarization rotated to be normal to the first beam's polarization show little change in the SRS backscatter when the second beam is added, consistent with the reduction in the SRS being caused by low frequency waves driven by the ponderomotive force produced by the beating of the two beams.

• OSTI ID: 20860196
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 13; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ICF DEVICES
INERTIAL CONFINEMENT
LASER-PRODUCED PLASMA
LASERS
LIGHT TRANSMISSION
NONLINEAR PROBLEMS
PLASMA HEATING
POLARIZATION
PONDEROMOTIVE FORCE
RAMAN EFFECT
THERMONUCLEAR IGNITION