Qiang Wang, Zhichao Li, Zhanjun Liu, Tao Gong, Wenshuai Zhang, Tao Xu, Bin Li, Ping Li, Xin Li, Chunyang Zheng, Lihua Cao, Xincheng Liu, Kaiqiang Pan, Hang Zhao, Yonggang Liu, Bo Deng, Lifei Hou, Yingjie Li, Xiangming Liu, Yulong Li, Xiaoshi Peng, Zanyang Guan, Qiangqiang Wang, Xingsen Che, Sanwei Li, Qiang Yin, Wei Zhang, Liqiong Xia, Peng Wang, Xiaohua Jiang, Liang Guo, Qi Li, Minqing He, Liang Hao, Hongbo Cai, Wudi Zheng, Shiyang Zou, Dong Yang, Feng Wang, Jiamin Yang, Baohan Zhang, Yongkun Ding, Xiantu He. The effects of incident light wavelength difference on the collective stimulated Brillouin scattering in plasmas[J]. Matter and Radiation at Extremes, 2023, 8(5): 055602
- Matter and Radiation at Extremes
- Vol. 8, Issue 5, 055602 (2023)
Fig. 1. Schematic representation of the octad LPI experiment on the Shenguang Octopus facility. The top left inset shows the incident power of each beam.
Fig. 2. (a)–(c) Measured angular distributions of SBS light for 1color, 2color+, and 2color− modes, respectively. (d) Statistics of measured FABS-SBS energy fraction. The red diamonds correspond to inner-cone averaging, the blue squares outer-cone averaging and the green stars octad averaging.
Fig. 3. Electron density n e (in units of n c ) and electron temperature T e (in keV) at t = 1.8 ns from the LARED-Integration code. The black solid lines indicate material boundaries, the black dashed rectangle indicates the LAP3D simulation box, and the blue dashed line indicate the ray where the CBET is evaluated in Fig. 4 .
Fig. 4. (a) Coupling coefficient ΓCBET along the ray indicated in Fig. 3 as a function of the wavelength shift Δλ = λ 2 − λ 1. (b) Relative energy gain of beam 2 as a function of Δλ .
Fig. 5. (a)–(c) Time-integrated angular distributions of SBS intensity obtained by LAP3D simulation, with the same linear color map used for all. (d)–(f) Angular distributions of common IAWs according to the theoretical prediction. The squares denote the backscattering IAWs of each beam. The circles denote all possible C 8 2 = 28 k 0 = 2π /λ 0 is the light wavenumber in vacuum.
Fig. 6. Sketch map of wave vector matching triangles when two SBS process share one IAW.
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