The effects of incident light wavelength difference on the collective stimulated Brillouin scattering in plasmas

IF 4.8 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Matter and Radiation at Extremes Pub Date : 2023-07-28 DOI:10.1063/5.0151372

Qian Wang, Zhi-chao Li, Zhanjun Liu, T. Gong, Wen-shuai Zhang, T. Xu, Bin Li, Ping Li, Xin Li, C. Zheng, L. Cao, Xincheng Liu, K. Pan, Hang Zhao, Yonggang Liu, B. Deng, Lifei Hou, Yingjie Li, Xiangming Liu, Yulong Li, X. Peng, Zanyang Guan, Qiangqiang Wang, X. Che, Sanwei Li, Qiang Yin, Wei Zhang, Liqiong Xia, Peng Wang, Xiaohua Jiang, Liang Guo, Qi Li, M. He, L. Hao, H. Cai, Wudi Zheng, S. Zou, Dong Yang, Feng Wang, Jiamin Yang, Bao-han Zhang, Yongkun Ding, Xiantu He

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引用次数: 0

Abstract

The first laser–plasma interaction experiment using lasers of eight beams grouped into one octad has been conducted on the Shenguang Octopus facility. Although each beam intensity is below its individual threshold for stimulated Brillouin backscattering (SBS), collective behaviors are excited to enhance the octad SBS. In particular, when two-color/cone lasers with wavelength separation 0.3 nm are used, the backward SBS reflectivities show novel behavior in which beams of longer wavelength achieve higher SBS gain. This property of SBS can be attributed to the rotation of the wave vectors of common ion acoustic waves due to the competition of detunings between geometrical angle and wavelength separation. This mechanism is confirmed using massively parallel supercomputer simulations with the three-dimensional laser–plasma interaction code LAP3D.

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入射光波长差对等离子体集体受激布里渊散射的影响

在神光八达通装置上进行了首次激光等离子体相互作用实验。虽然每个光束强度都低于受激布里渊后向散射(SBS)的阈值，但集体行为被激发以增强八阶布里渊后向散射。特别地，当使用波长间隔为0.3 nm的双色/锥激光器时，后向SBS反射率表现出新颖的特性，波长越长的光束获得更高的SBS增益。SBS的这种特性可以归因于共离子声波的波矢量由于几何角度和波长分离之间的失谐竞争而发生的旋转。利用三维激光等离子体相互作用代码LAP3D进行大规模并行超级计算机模拟，证实了这一机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Matter and Radiation at Extremes Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

8.60

自引率

9.80%

发文量

160

审稿时长

15 weeks

期刊介绍： Matter and Radiation at Extremes (MRE), is committed to the publication of original and impactful research and review papers that address extreme states of matter and radiation, and the associated science and technology that are employed to produce and diagnose these conditions in the laboratory. Drivers, targets and diagnostics are included along with related numerical simulation and computational methods. It aims to provide a peer-reviewed platform for the international physics community and promote worldwide dissemination of the latest and impactful research in related fields.