Analysis of stimulated Raman backscatter and stimulated Brillouin backscatter in experiments performed on SG-III prototype facility with a spectral analysis code
Analysis of stimulated Raman backscatter and stimulated Brillouin backscatter in experiments performed on SG-III prototype facility with a spectral analysis code
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使用光谱分析代码在 SG-III 原型设备上进行的实验中分析受激拉曼反向散射和受激布里渊反向散射
DOI：
10.1063/1.4890019
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发表时间：
2014-07
影响因子：
2.2
通讯作者：
Wei, Huiyue
中科院分区：
文献类型：
--
作者：
Li, Zhichao;Li, Sanwei;Xu, Tao;Wei, Huiyue
2011年首次在神光三号(SG-III)样机上进行了黑腔中受激拉曼背向散射(SRS)和受激布里渊背向散射(SBS)的观测实验。本文首次用一维谱分析程序对相关实验结果进行了分析，该程序是为了研究黑洞等离子体中受激拉曼散射和受激布里渊散射共存的过程而开发的。讨论了不同等离子体参数下背向散射光的光谱特性。在空腔实验的情况下，模拟结果表明，在空腔壁附近能量沉积区快速增长的SBS是主要的不稳定过程。数值计算得到了受激拉曼散射和受激布里渊散射的时间分辨光谱，与实验观测结果相吻合。对于充气空腔实验，模拟结果表明，SBS在Au等离子体中生长最快，在C5H12气体中对流放大，而SRS主要在高密度气体中生长.
Experiments about the observations of stimulated Raman backscatter (SRS) and stimulated Brillouin backscatter (SBS) in Hohlraum were performed on Shenguang-III (SG-III) prototype facility for the first time in 2011. In this paper, relevant experimental results are analyzed for the first time with a one-dimension spectral analysis code, which is developed to study the coexistent process of SRS and SBS in Hohlraum plasma condition. Spectral features of the backscattered light are discussed with different plasma parameters. In the case of empty Hohlraum experiments, simulation results indicate that SBS, which grows fast at the energy deposition region near the Hohlraum wall, is the dominant instability process. The time resolved spectra of SRS and SBS are numerically obtained, which agree with the experimental observations. For the gas-filled Hohlraum experiments, simulation results show that SBS grows fastest in Au plasma and amplifies convectively in C5H12 gas, whereas SRS mainly grows in the high density ...
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