首页> 中文期刊> 《极端条件下的物质与辐射(英文)》 >Mitigating parametric instabilities in plasmas by sunlight-like lasers

Mitigating parametric instabilities in plasmas by sunlight-like lasers

         

摘要

Sunlight-like lasers that have a continuous broad frequency spectrum,random phase spectrum,and random polarization are formulated theoretically.With a sunlight-like laser beam consisting of a sequence of temporal speckles,the resonant three-wave coupling that underlies parametric instabilities in laser–plasma interactions can be greatly degraded owing to the limited duration of each speckle and the frequency shift between two adjacent speckles.The wave coupling can be further weakened by the random polarization of such beams.Numerical simulations demonstrate that the intensity threshold of stimulated Raman scattering in homogeneous plasmas can be doubled by using a sunlight-like laser beam with a relative bandwidth of∼1%as compared with a monochromatic laser beam.Consequently,the hot-electron generation harmful to inertial confinement fusion can be effectively controlled by using sunlight-like laser drivers.Such drivers may be realized in the next generation of broadband lasers by combining two or more broadband beams with independent phase spectra or by applying polarization smoothing to a single broadband beam.

著录项

  • 来源
    《极端条件下的物质与辐射(英文)》 |2021年第5期|P.54-61|共8页
  • 作者单位

    Key Laboratory for Laser Plasmas(MoE) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 ChinaCollaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 ChinaGraduate School of Engineering Utsunomiya University Yohtoh 7-1-2 Utsunomiya 321-8585 Japan;

    Key Laboratory for Laser Plasmas(MoE) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 ChinaCollaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 ChinaInstitute for Advanced Simulation J¨ulich Supercomputing Centre Forschungszentrum J¨ulich 52425 J¨ulich Germany;

    Key Laboratory for Laser Plasmas(MoE) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 ChinaCollaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 China;

    Key Laboratory for Laser Plasmas(MoE) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 ChinaCollaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 China;

    Graduate School of Engineering Utsunomiya University Yohtoh 7-1-2 Utsunomiya 321-8585 Japan;

    Institute for Advanced Simulation J¨ulich Supercomputing Centre Forschungszentrum J¨ulich 52425 J¨ulich GermanyCentre for Mathematical Plasma Astrophysics Katholieke Universiteit Leuven 3000 Leuven Belgium;

    Key Laboratory for Laser Plasmas(MoE) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 ChinaCollaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 ChinaSUPA Department of Physics University of Strathclyde Glasgow G40NG United KingdomTsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai 200240 China;

    Key Laboratory for Laser Plasmas(MoE) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 ChinaCollaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai 200240 China;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 光电子技术、激光技术;
  • 关键词

    polarization; scattering; speckle;

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