Jc. Fernandez et al., DEPENDENCE OF STIMULATED BRILLOUIN-SCATTERING ON LASER INTENSITY, LASER F-NUMBER, AND ION SPECIES IN HOHLRAUM PLASMAS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 53(3), 1996, pp. 2747-2750
Stimulated Brillouin scattering has been studied in plasma conditions
approaching those expected within laser-driven cavities (hohlraums) ca
pable of driving a fusion capsule to ignition with x rays. These condi
tions are achieved using a gas-filled hohlraum design that was fielded
at the Nova laser. As the intensity of an interaction beam (351 nm in
wavelength) is increased above an onset value I-c, the measured Brill
ouin backscatter into the lens rises sharply and saturates. I-c decrea
ses as the optic f number increases. The saturation level depends on t
he gas ion species.