Revealing crossed-beam energy transfer as the origin of asymmetric backscattering in hohlraums

Liang Hao, Tao Gong, Wen Yi Huo (), Zhichao Li (), Yaoyuan Liu, Jie Qiu, Qi Li, Hang Zhao, Kaiqiang Pan, Sanwei Li, Lifei Hou, Yonggang Liu, Xiangming Liu, Yulong Li, Wudi Zheng, Lihua Cao, Hongbo Cai, Lifeng Wang, Yingkui Zhao, Yunsong Dong, Feng Wang, Dong Yang, Jiamin Yang, Zongqing Zhao, Shiyang Zou, Shaoping Zhu and Yongkun Ding
Additional contact information
Liang Hao: Institute of Applied Physics and Computational Mathematics
Tao Gong: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Wen Yi Huo: Institute of Applied Physics and Computational Mathematics
Zhichao Li: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Yaoyuan Liu: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Jie Qiu: Institute of Applied Physics and Computational Mathematics
Qi Li: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Hang Zhao: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Kaiqiang Pan: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Sanwei Li: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Lifei Hou: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Yonggang Liu: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Xiangming Liu: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Yulong Li: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Wudi Zheng: Institute of Applied Physics and Computational Mathematics
Lihua Cao: Institute of Applied Physics and Computational Mathematics
Hongbo Cai: Institute of Applied Physics and Computational Mathematics
Lifeng Wang: Institute of Applied Physics and Computational Mathematics
Yingkui Zhao: Institute of Applied Physics and Computational Mathematics
Yunsong Dong: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Feng Wang: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Dong Yang: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Jiamin Yang: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Zongqing Zhao: China Academy of Engineering Physics, National Key Laboratory of Plasma Physics, Laser Fusion Research Center
Shiyang Zou: Institute of Applied Physics and Computational Mathematics
Shaoping Zhu: Institute of Applied Physics and Computational Mathematics
Yongkun Ding: Institute of Applied Physics and Computational Mathematics

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract Backscattering due to laser plasma instabilities (LPIs) presents a risk in the laser-driven inertial confinement fusion. Generally, it is assumed that the backscattering of laser beams in the same cone is identical in hohlraum physics studies. In the experiments performed at SG-100kJ laser facility, we find that the backscattering of laser beams in the same cone are quite different. Our investigation reveals the main reason for this phenomenon is that the laser beams in the same cone obtain different power from their neighbor beams via crossed-beam energy transfer (CBET) depending on their polarizations. The dependence of multi-beam CBET on laser polarization arrangement is confirmed in a specially designed experiment. These findings are crucial for understanding the backscattering, CBET, energy deficit and the azimuthal drive asymmetry in cylindrical hohlraums.

Date: 2025
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DOI: 10.1038/s41467-025-65290-1

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