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激光直接驱动内爆DT燃料面密度诊断

杨洪琼 杨建伦 温树槐 王根兴 郭玉芝 唐正元 牟维兵 马驰

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激光直接驱动内爆DT燃料面密度诊断

杨洪琼, 杨建伦, 温树槐, 王根兴, 郭玉芝, 唐正元, 牟维兵, 马驰

DT FUEL AREAL DENSITY DIAGNOSTIC IN DIRECT-DRIVEN IMPLOSIONS

YANG HONG-QIONG, YANG JIAN-LUN, WEN SHU-HUAI, WANG GEN-XING, GUO YU-ZHI, TANG ZHENG-YUAN, MU WEI-BING, MA CHI
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  • 在神光Ⅱ基频光直接驱动内爆实验中,利用CR39径迹探测器测量了DT靶丸释放出的14MeV中子弹性散射后逃逸出燃料的反冲D核和反冲T核的数量,实现了激光聚变实验中燃料面密度〈ρR〉的诊断.测量结果表明,靶面激光照射均匀度对压缩状态具有一定程度的影响,爆推靶〈ρR〉低于烧蚀靶〈ρR〉一个量级左右,表明烧蚀靶压缩情况比爆推靶好,超热电子预热严重影响压缩
    The diagnostic of DT fuel plasma areal density in the direct-driven implosion experiments on SG-Ⅱ laser facility has been performed by measuring the number of recoil D and T produced by 14MeV neutron′s scattering. The particles of recoil D and T were detected by CR39 solid-state nuclear track detector. The experimental results indicate that the uniformity of laser illuminating affects the compression to a certain extent. The areal density of exploding pusher target is about one order lower than that of ablative-driven target. This means that the compression of ablative-driven target is better than exploding pusher target. There is a strong relationship between areal density and suprathermal electron heating.
    • 基金项目: 国家高技术研究发展计划惯性约束聚变基金(批准号:863416348)资助的课题.
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  • 文章访问数:  7027
  • PDF下载量:  636
  • 被引次数: 0
出版历程
  • 收稿日期:  2001-03-01
  • 修回日期:  2001-06-02
  • 刊出日期:  2001-06-05

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