Mix of high-Z material from the capsule into the fuel can severely degrade the performance of inertial fusion implosions. On the Hybrid B campaign, testing the largest high-density-carbon capsules yet fielded at the National Ignition Facility, several shots show signatures of high levels of hot-spot mix. We attribute a ∼ 40 % yield degradation on these shots to the hot-spot mix, comparable to the level of degradation from large P2 asymmetries observed on some shots. A range of instability growth factors and diamond crystallinity were tested and they do not determine the level of mix for these implosions, which is instead set by the capsule quality.

中文翻译：

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NIF 大规模 HDC 内爆中的热点混合

将胶囊中的高 Z 材料混合到燃料中会严重降低惯性聚变内爆的性能。在 Hybrid B 活动中，测试了在国家点火设施中部署的最大的高密度碳胶囊，几个镜头显示了高水平热点混合的特征。我们将这些镜头的约 40% 的产量下降归因于热点混合，这与在某些镜头上观察到的大 P2 不对称的退化水平相当。测试了一系列不稳定性生长因子和金刚石结晶度，它们不能确定这些内爆的混合水平，而是由胶囊质量决定。