Observation of polarization dependent Raman scattering in a large scale plasma illuminated with multiple laser beams
- 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, Vol. 13, Issue 8; Other Information: DOI: 10.1063/1.2215415; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Reducing parametric backscattering by polarization rotation
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journal | October 2016 |
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