Recent inertial confinement fusion measurements have highlighted the importance of 3D asymmetry effects on implosion performance. One prominent example is the bulk drift velocity of the deuterium–tritium plasma undergoing fusion (“hotspot”), v_HS. Upgrades to the National Ignition Facility neutron time-of-flight diagnostics now provide v_HS to better than 1 part in 10⁴ and enable cross correlations with other measurements. This work presents the impact of v_HS on the neutron yield, downscatter ratio, apparent ion temperature, electron temperature, and 2D x-ray emission. The necessary improvements to diagnostic suites to take these measurements are also detailed. The benefits of using cross-diagnostic analysis to test hotspot models and theory are discussed, and cross-shot trends are shown.

中文翻译：

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惯性约束聚变等离子体的三维诊断和测量

最近的惯性约束聚变测量强调了 3D 不对称性对内爆性能的重要性。一个突出的例子是正在进行聚变（“热点”）的氘-氚等离子体的体积漂移速度，v _HS。现在，升级到国家点火装置中子飞行时间诊断程序后，v _HS优于10 ^{4分之一，}并且可以与其他测量值进行互相关。这项工作展示了 v _HS的影响中子产额、下散射比、表观离子温度、电子温度和 2D X 射线发射。还详细介绍了为进行这些测量而对诊断套件进行的必要改进。讨论了使用交叉诊断分析来测试热点模型和理论的好处，并显示了交叉镜头的趋势。