A series of thin glass-shell shock-driven DT gas-filled capsule implosions was conducted at the OMEGA laser facility. These experiments generate conditions relevant to the central plasma during the shock-convergence phase of ablatively driven inertial confinement fusion (ICF) implosions. The spectral temperatures inferred from the DTn and DDn spectra are most consistent with a two-ion-temperature plasma, where the initial apparent temperature ratio, $\frac{T_T}{T_D}$, is 1.5. This is an experimental confirmation of the long-standing conjecture that plasma shocks couple energy directly proportional to the species mass in multi-ion plasmas. The apparent temperature ratio trend with equilibration time matches expected thermal equilibration described by hydrodynamic theory. This indicates that deuterium and tritium ions have different energy distributions for the time period surrounding shock convergence in ignition-relevant ICF implosions.

中文翻译：

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惯性约束聚变激波会聚阶段氘和氚的热解耦

在 OMEGA 激光设施中进行了一系列薄玻璃壳冲击驱动的 DT 充气胶囊内爆。这些实验在烧蚀驱动的惯性约束聚变 (ICF) 内爆的激波会聚阶段产生了与中心等离子体相关的条件。从 DTn 和 DDn 光谱推断的光谱温度与双离子温度等离子体最一致，其中初始表观温度比为$\frac{{吨}_{吨}}{{吨}_D}$，是 1.5。这是对长期存在的猜想的实验证实，即等离子体冲击耦合能量与多离子等离子体中的物质质量成正比。平衡时间的表观温度比趋势与流体动力学理论描述的预期热平衡相匹配。这表明在与点火相关的 ICF 内爆中，在激波收敛周围的时间段内，氘和氚离子具有不同的能量分布。