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间接驱动双金属壳靶内爆出中子实验研究

丁嘉帆 黎航 蒋炜 景龙飞 林雉伟 郭亮

丁嘉帆, 黎航, 蒋炜, 等. 间接驱动双金属壳靶内爆出中子实验研究[J]. 强激光与粒子束. doi: 10.11884/HPLPB202537.240335
引用本文: 丁嘉帆, 黎航, 蒋炜, 等. 间接驱动双金属壳靶内爆出中子实验研究[J]. 强激光与粒子束. doi: 10.11884/HPLPB202537.240335
Ding Jiafan, Li Hang, Jiang Wei, et al. Implosion experiment of neutron yield in indirect driven double-metal-shell target[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.240335
Citation: Ding Jiafan, Li Hang, Jiang Wei, et al. Implosion experiment of neutron yield in indirect driven double-metal-shell target[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202537.240335

间接驱动双金属壳靶内爆出中子实验研究

doi: 10.11884/HPLPB202537.240335
基金项目: 国家自然基金项目(12105269);国家自然基金项目(12175210);等离子体物理全国重点实验室基金项目(Grant. JCKYS2023212807)
详细信息
    作者简介:

    丁嘉帆,dingjiafan22@gscaep.ac.cn

    通讯作者:

    郭 亮,lianguo_job@163.com

  • 中图分类号: O571.44

Implosion experiment of neutron yield in indirect driven double-metal-shell target

  • 摘要: 本文介绍了基于百千焦激光装置开展的一系列激光间接驱动双金属壳靶内爆出中子实验。双金属壳靶的设计来源于体点火方案,该方案通过解耦辐射烧蚀与内爆压缩过程,从而提高了内爆的鲁棒性。然而,由于双金属壳靶制备难度较大,首次实验中的中子产额远低于模拟预期。为解决这一问题,本文提出了两项关键改进措施:一是优化外壳接缝设计,降低流体力学不稳定性因素的影响,提高内外壳的碰撞效率以及内球的内爆效率;二是提高黑腔靶丸的耦合效率,增强激光能量的有效传递。通过这些改进,靶丸的压缩性能和内爆效率得到显著提升,最终实现了中子产额从$ 5.0\times {10}^{7} $提升至$ 7.1\times {10}^{8} $
  • 图  1  双壳靶丸结构与激光注入柱形黑腔示意图

    Figure  1.  Double-shell target structure and illustration of laser injection of cylindrical hohlraum

    图  2  双壳靶丸CT照片

    Figure  2.  CT scan of the double-shell target

    图  3  LBM模型预估(红色)与实际测量(黑色)的峰值辐射温度

    Figure  3.  Radiative temperatures estimated by the LBM model and measured actual radiative temperatures

    图  4  基于首次实验初始靶设计参数的一维流线图

    Figure  4.  One-dimensional streamline of the basic design

    表  1  不同发次的黑腔参数和辐射温度

    Table  1.   Hohlraum Parameters and Radiation Temperatures for Different Shots

    Shot length of
    hohlraum/μm
    diameter of
    hohlraum/μm
    diameter of
    LEH/μm
    hohlraum wall
    material
    laser
    duration/ns
    square wave peak
    power/TW
    laser
    energy/kJ
    Measurement
    Tr_42/eV
    20182 5100 3000 1700 Au 3.0 1.0 147.1 238.2
    21173 5100 3000 1700 Au 3.0 1.1 152.3 244.8
    22019 4680 2600 1500 U 3.0 1.1 158.2 255.1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-09-19
  • 修回日期:  2024-11-21
  • 录用日期:  2024-11-11
  • 网络出版日期:  2025-01-13

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