Backward scattering of laser plasma interactions from hundreds-of-joules broadband laser on thick target
Peipei Wang, Honghai An, Zhiheng Fang, Jun Xiong, Zhiyong Xie, Chen Wang, Zhiyu He, Guo Jia, Ruirong Wang, Shu Zheng, Lan Xia, Wei Feng, Haitao Shi, Wei Wang, Jinren Sun, Yanqi Gao, Sizu Fu
Abstract
The use of broadband laser technology is a novel approach for inhibiting processes related to laser plasma interactions (LPIs). In this study, several preliminary experiments into broadband-laser-driven LPIs are carried out using a newly established hundreds-of-joules broadband second-harmonic-generation laser facility. Through direct comparison with LPI results for a traditional narrowband laser, the actual LPI-suppression effect of the broadband laser is shown. The broadband laser had a clear suppressive effect on both back-stimulated Raman scattering and back-stimulated Brillouin scattering at laser intensities below 1 × 1015 W cm−2. An abnormal hot-electron phenomenon is also investigated, using targets of different thicknesses.