强激光与粒子束, 2014, 26 (3): 032006, 网络出版: 2014-03-31
神光Ⅲ原型装置的黑腔靶背向散射光测量技术
Backscatter light diagnosis with hohlraum on SG-Ⅲ prototype laser facility
激光等离子体 背向散射诊断系统 受激拉曼散射 受激布里渊散射 laser plasma backscatter light diagnosis stimulated Raman scattering stimulated Brillouin scattering
摘要
在惯性约束聚变研究中,为研究激光等离子体互作用产生的受激布里渊与受激拉曼散射光(SRS),基于神光Ⅲ原型装置利用新的背向散射诊断系统对真空黑腔靶与充气黑腔靶以及有无束匀滑效果情况下的散射光光谱进行了测量。实验发现,在相同条件下,充气黑腔靶SRS散射光比真空黑腔靶大,在终端光学组件中使用束匀滑效果后也能降低散射光。诊断系统记录的散射光强度及光谱的时间变化过程对研究激光等离子体相互作用提供了重要的数据支撑。
Abstract
To study the stimulated Brillouin scattering (SBS) and stimulated Raman scattering(SRS) light produced during the inertial confinement fusion (ICF) studies on SG-Ⅲ prototype laser facility, the spectra of scattered light from vacuum hohlraum and gas filled hohlraum are measured using a new backscatter light diagnostic system. Experimental results show that the gas filled hohlraums produce more SRS light than the vacuum hohlraums under the same experimental parameters. Meanwhile, the scattered light will be reduced with the application of smoothing into optical module. The temporal evolution of the intensity and spectra of the scattered light can be recorded by this new backscatter light diagnostic system, which is valuable for the studies of ICF.
魏惠月, 杨冬, 徐涛, 王峰, 彭晓世. 神光Ⅲ原型装置的黑腔靶背向散射光测量技术[J]. 强激光与粒子束, 2014, 26(3): 032006. Wei Huiyue, Yang Dong, Xu Tao, Wang Feng, Peng Xiaoshi. Backscatter light diagnosis with hohlraum on SG-Ⅲ prototype laser facility[J]. High Power Laser and Particle Beams, 2014, 26(3): 032006.