Laser-light-absorption studies at 1.06 micron, 0.53 micron and 0.35 micron wavelengths

Results are presented of light absorption in a series of wavelength scaling experiments recently completed at LLNL. The Argus facility was used to do target studies at 1.06 micrometers, 0.53 micrometers and 0.35 micrometers. Box calorimeter scattered light measurements implied greatly improve laser light absorption for both high Z and low Z plasmas at laser wavelengths shorter than 1.06 micrometers. Furthermore, at the 0.35 micrometers laser wavelength, the inferred absorption is nearly 100% over a substantial range of incident laser intensities. Our results further show a dramatic decrease in the stimulated Brillouin scattered light at 0.35 micrometer relative to the values at 1.0 micrometers and 0.53 micrometers.