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arXiv 1406.7108physics.plasm-ph
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惯性约束聚变中子诊断的组分分离和改进

Species separation and modification of neutron diagnostics in inertial-confinement fusion

Aurelie Inglebert, Benoit Canaud, Olivier Larroche

摘要:

采用离子Fokker-Planck模型研究了边缘点火低温DT惯性约束聚变(ICF)靶热点中氘(D)和氚(T)的不同行为。相对于等效的单组分模型,T在靶内爆的停滞阶段具有更高的密度和更高的温度。此外,停滞的热点被发现是较低的密度,但比在单物种的情况下更热。结果,在热点中的熔合反应产率显著增加。聚变中子诊断的内爆发现一个更大的离子温度推导出DT反应比DD反应,与NIF的实验结果吻合得很好。因此,ICF靶设计应明确考虑离子动力学效应。

英文摘要:

The different behaviours of deuterium (D) and tritium (T) in the hot spot of marginally-igniting cryogenic DT inertial-confinement fusion (ICF) targets are investigated with an ion Fokker-Planck model. With respect to an equivalent single-species model, a higher density and a higher temperature are found for T in the stagnation phase of the target implosion. In addition, the stagnating hot spot is found to be less dense but hotter than in the single-species case. As a result, the fusion reaction yield in the hot spot is significantly increased. Fusion neutron diagnostics of the implosion find a larger ion temperature as deduced from DT reactions than from DD reactions, in good agreement with NIF experimental results. ICF target designs should thus definitely take ion-kinetic effects into account.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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