Energy fraction measurements of stimulated Brillouin scattering and stimulated Raman scattering on Shenguang-Ⅲ prototype laser facility

The measurement of the fraction of laser-entrance energy, which is carried out mainly through the measurement of scattering light, is very important in the measurement of coupling efficiency of the hohlraum. The angular distribution of scattering light is measured on the Shenguang-Ⅲ prototype laser facility using the PIN detector array. It is demonstrated that the nonlinear laser plasma interaction, in which the stimulated Raman scattering fraction is about 10% and the stimulated Brillouin scattering about 20%, is stronger than that on Shenguang-Ⅱ laser facility. The laser target coupling efficiency thus evaluated is taken into the formula which describes the radiation temperature scaling law. The calculated radiation temperature agrees well with the experimental Dante results, which ind