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Volume 11 Issue 3
May  2026
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Article Navigation >  Matter and Radiation at Extremes  > 2026  >  11(3): 037403
T. Gong, Z. C. Li, T. Xu, Q. Wang, Y. Y. Liu, K. Q. Pan, Y. Ji, W. S. Zhang, B. Li, Z. J. Liu, X. Li, L. Hao, R. Yan, H. Zhao, Y. G. Liu, B. Deng, X. M. Liu, Y. L. Li, X. S. Peng, Z. Y. Guan, S. W. Li, X. H. Jiang, Q. Li, W. Zhang, J. Zheng, P. Li, H. B. Cai, S. Y. Zou, Y. S. Dong, F. Wang, D. Yang, Q. H. Zhu, J. M. Yang, Z. Q. Zhao, Y. K. Ding. First laser–plasma interaction experiments on Shenguang Octopus laser facility[J]. Matter and Radiation at Extremes, 2026, 11(3): 037403. doi: 10.1063/5.0301251
Citation: T. Gong, Z. C. Li, T. Xu, Q. Wang, Y. Y. Liu, K. Q. Pan, Y. Ji, W. S. Zhang, B. Li, Z. J. Liu, X. Li, L. Hao, R. Yan, H. Zhao, Y. G. Liu, B. Deng, X. M. Liu, Y. L. Li, X. S. Peng, Z. Y. Guan, S. W. Li, X. H. Jiang, Q. Li, W. Zhang, J. Zheng, P. Li, H. B. Cai, S. Y. Zou, Y. S. Dong, F. Wang, D. Yang, Q. H. Zhu, J. M. Yang, Z. Q. Zhao, Y. K. Ding. First laser–plasma interaction experiments on Shenguang Octopus laser facility[J]. Matter and Radiation at Extremes, 2026, 11(3): 037403. doi: 10.1063/5.0301251
shu

First laser–plasma interaction experiments on Shenguang Octopus laser facility

doi: 10.1063/5.0301251
  • 1.

    National Key Laboratory of Plasma Physics, Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China

  • 2.

    Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China

  • 3.

    Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

  • 4.

    Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China

  • 5.

    Department of Plasma Physics and Fusion Engineering and CAS Key Laboratory of Geospace Environment, University of Science and Technology of China, Hefei, Anhui 230026, China

More Information
  • Corresponding author: a)Authors to whom correspondence should be addressed: lizhi@mail.ustc.edu.cn; liuzj@iapcm.ac.cn; and yangdong1@caep.cn
  • Received Date: 2025-09-07
  • Accepted Date: 2026-02-08
    • Available Online: 2026-05-28
  • Publish Date: 2026-05-28
    Abstract
  • On laser facilities for achieving inertial confinement fusion ignition, several beams are usually bundled together and injected into the target chamber through a common port. This specific configuration could lead to laser–plasma interaction (LPI) processes that are quite different from those of a single laser beam, as well as to more options for suppressing LPI via combination of different laser smoothing techniques on the beams in a bundle. For studying LPI of a bundle of beams, a novel facility named Shenguang Octopus has been developed. Recently, the first LPI experiments have been performed by axially irradiating a gas-filled glass pipe or a gold hohlraum target with the bundled eight laser beams at an overlapped intensity of ∼1×1015W/cm2, producing ∼5-mm-long homogeneous plasmas with densities of ∼3×1020cm−3 and temperatures of 1.2–1.5 keV. Efficient laser propagation without plasma filamentation and beam spraying has been observed via side-on X-ray images of glass pipe targets. Results from the gold hohlraum targets indicate that single-beam backward stimulated Brillouin scattering (SBS) and multibeam seeded side-SBS play major roles in the interaction, while other multibeam LPI processes expected before the experiments are not observed. Several beam smoothing techniques, such as mixed polarizations, smoothing by spectral dispersion, and multicolor mode, are demonstrated to be effective in suppressing LPI under current conditions.
    • Conflict of Interest
    The authors have no conflicts to disclose.
    Author Contributions
    T. Gong: Investigation (equal); Visualization (equal); Writing – original draft (lead); Writing – review & editing (lead). Z. C. Li: Conceptualization (equal); Funding acquisition (equal); Investigation (equal). T. Xu: Data curation (equal); Visualization (equal). Q. Wang: Investigation (equal). Y. Y. Liu: Data curation (equal); Investigation (equal). K. Q. Pan: Data curation (equal). Y. Ji: Formal analysis (equal). W. S. Zhang: Formal analysis (equal). B. Li: Formal analysis (equal). Z. J. Liu: Investigation (equal). X. Li: Formal analysis (equal). L. Hao: Formal analysis (equal). R. Yan: Formal analysis (equal). H. Zhao: Data curation (equal). Y. G. Liu: Data curation (equal). B. Deng: Data curation (equal). X. M. Liu: Data curation (equal). Y. L. Li: Data curation (equal). X. S. Peng: Data curation (equal). Z. Y. Guan: Data curation (equal). S. W. Li: Formal analysis (equal). X. H. Jiang: Data curation (equal). Q. Li: Data curation (equal). W. Zhang: Data curation (equal). J. Zheng: Formal analysis (equal). P. Li: Data curation (equal). H. B. Cai: Formal analysis (equal). S. Y. Zou: Formal analysis (equal). Y. S. Dong: Formal analysis (equal). F. Wang: Data curation (equal). D. Yang: Conceptualization (equal); Formal analysis (equal); Investigation (equal). Q. H. Zhu: Formal analysis (equal). J. M. Yang: Formal analysis (equal). Z. Q. Zhao: Funding acquisition (equal). Y. K. Ding: Formal analysis (equal).
    The data that support the findings of this study are available from the corresponding author upon reasonable request.
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