Effect of sinusoidal density modulations on stimulated Raman and Brillouin scattering instabilities
Abstract
Stimulated Raman (SRS) and Brillouin (SBS) scattering are expected to reach significant levels in the long and homogeneous plasmas that will be produced with the NIF and LMJ. We have performed an experiment as to measure modifications of SRS and SBS of a 1.053 μ m interaction beam when a small scale ( ∼6μ m) sinusoidal modulation of the density is imposed along the laser propagation axis. These density perturbations can affect the SRS and SBS development as they break the plasma homogeneity and can couple to the stimulated electron plasma waves (EPW) and ion acoustic waves (IAW). Diagnostics of the SRS and SBS activities include time, space and spectrally resolved analysis of the light Thomson scattered off stimulated EPW and IAW as well as backscattering measurements.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2003
- Bibcode:
- 2003APS..DPPQO1005D