Abstract

In Inertial Confinement Fusion the ignition of the Deuterium–Tritium fuel and the self-sustained thermonuclear burn-wave propagation depend on several factors among them the reaction rate, product of the number densities of the reactants and the thermal reactivity of the fusion reaction. Different mechanisms could affect the reactivity and modify the final thermonuclear gain leading to a failure of ignition. Here, it is analysed the effect of a fuel reaction rate degraded by a given factor \(\upchi ~< ~1\) on the kinetic energy needed to reach fuel ignition and thermonuclear burn-out. Ignition and burnout thresholds are firstly defined in the metrics of reactivity factor \(\upchi \) and homothetic scaling curves. Then a parametric variation of \(\upchi \) shows that a reduction of 10% (20%) on the reaction rate approximately implies a 15% (50% respectively) increase in the kinetic energies thresholds.

Graphical abstract

中文翻译：

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惯性约束聚变胶囊性能对燃料反应速率的依赖性

摘要

在惯性约束聚变中，氘-fuel燃料的点火和自持的热核燃烧波传播取决于几个因素，其中包括反应速率，反应物数量密度的乘积和聚变反应的热反应性。不同的机制可能会影响反应性并改变最终的热核增益，从而导致点火失败。在此，分析了燃料反应速率降低给定因子\（\ upchi〜<〜〜1 \）对达到燃料着火和热核燃尽所需的动能的影响。首先在反应因子\（\ upchi \）和合成比例曲线的度量标准中定义点火和燃尽阈值。然后\（\ upchi \）的参数变化 结果表明，反应速率降低10％（20％）大约意味着动能阈值提高了15％（分别为50％）。

图形概要