A frequency filter of backscattered light of stimulated Raman scattering due to the Raman rescattering in the gas-filled hohlraums
A frequency filter of backscattered light of stimulated Raman scattering due to the Raman rescattering in the gas-filled hohlraums
复制标题
由于气体填充黑腔中的拉曼再散射而产生的受激拉曼散射的反向散射光的频率滤波器
DOI：
10.1088/1741-4326/abd921
复制
发表时间：
2021
期刊：
影响因子：
3.3
通讯作者：
Chuang Ren
中科院分区：
文献类型：
--
作者：
Liang Hao;Wen Yi Huo;Zhanjun Liu;Jun Li;Chunyang Zheng;Chuang Ren
The coupling evolutions of stimulated Raman scattering (SRS) and Raman rescattering (re-SRS) are investigated under the parameter conditions of relevance to the gas-filled hohlraum experiments at the National Ignition Facility by using the nonenveloped fluid code FLAME. It is found that re-SRS works as a frequency filter of the backscattered light of SRS in the gas region. The low frequency modes of scattered light originated from a higher density region would stimulate re-SRS and be heavily depleted by re-SRS near the region of their quarter critical density. The energy in daughter waves of re-SRS is deposited in the gas plasmas. The large amplitude of the daughter Langmuir wave of re-SRS would stimulate cascade Langmuir decay instabilities and induce obvious low frequency density modulations, which can further result in the inflation of high frequency modes of scattered light of SRS at densities lower than the growth region of re-SRS.
