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首页> 外文会议>International conference on advanced diagnostics for magnetic and inertial fusion >LASER FUSION FUEL ION TEMPERATURE DIAGNOSTICS
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LASER FUSION FUEL ION TEMPERATURE DIAGNOSTICS

机译：激光融合燃料离子温度诊断

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The fusion fuel ion temperature is a very important implosion dynamics parameter in initial confinement fusion (ICF) research. It is often determined by the neutron time of flight (TOF) technique, which utilizes the neutron Doppler broadening due to the center-of-mass motion of the reacting ions in the fusion fuel. However, the relative yield method has an advantage when the neutron yield is low. On this condition the detector must be placed at a closer distance from the fuel-filled implosion capsule for enough statistical counts, which will cause a narrower neutron TOF width and thus a greater error as the detection system has a certain response time. But it is possible to employ a suitable fuel mixture in which different reactions occur simultaneously although the implosion neutron yield is sensitive not only to the ion temperature alone. Supposing that the final density ratio of the different fusion fuel components in the compressed microballoon core remains constant as compared with the initial one, the relative yield depends only on the ratio of averaged <σv> for the different reactions, where σ and v denote the reaction cross section and the relative velocity, respectively. Since the dependence of <σv> on temperature is different for different reactions, the relative yield ratio can reflect the ion temperature.
机译：融合燃料离子温度是初始监禁融合（ICF）研究中的一个非常重要的Instlosion动态参数。它通常由飞行中的中子时间（TOF）技术决定，其由于熔化离子的反应离子的质量态度而利用中子多普勒展现。然而，当中子产量低时相对产量方法具有优点。在这种情况下，检测器必须放置在距离燃料填充的内衬胶囊的近距离距离，以获得足够的统计计数，这将导致较窄的中子TOF宽度，因此较大的误差，因为检测系统具有一定的响应时间。但是，可以采用合适的燃料混合物，其中同时发生不同的反应，尽管Instloion中子产率不仅敏感到单独的离子温度。假设与初始磁性核心的不同融合燃料分量的最终密度比保持恒定，相对产量仅取决于不同反应的平均<σv>的比率，其中σ和v表示分别反应横截面和相对速度。由于<ΣV>在温度上的依赖性不同，对于不同的反应，相对屈服比可以反映离子温度。

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