Reduction of Three-Halves Harmonic Emission from Laser-Produced Plasmas withBroadwidth Induced Spatial Incoherence at 0.53 micrometer

摘要

Measurements of the omega sub 0/2 emission from Laser irradiated targets at 0.53micrometers were made at three angles over a wide range of Laser bandwidths with and without induced spatial incoherence (ISI) echelons. THe 3 microns/2 emission was found to be correlated with hard x rays but not Raman spectra suggesting that the 3 omega sub 0/2 radiation was due to two plasmon decay. Reduction of both 3 omega sub 0/2 emission and the accompanying hard x rays by ISI required five to ten times larger bandwidths than needed to suppress stimulated Raman scattering and stimulated Brilloin scattering.