The measurement of plasma hotspot velocity provides an important diagnostic of implosion performance for inertial confinement fusion experiments at the National Ignition Facility. The shift of the fusion product neutron mean kinetic energy as measured along multiple line-of-sight time-of-flight spectrometers provides velocity vector components from which the hotspot velocity is inferred. Multiple measurements improve the hotspot velocity inference; however, practical considerations of available space, operational overhead, and instrumentation costs limit the number of possible line-of-sight measurements. We propose a solution to this classical “experiment design” problem that optimizes the precision of the velocity inference for a limited number of measurements.

中文翻译：

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确定国家点火设施等离子热点速度的多个视线测量的最佳选择

等离子体热点速度的测量为国家点火设施的惯性约束融合实验提供了重要的内爆性能诊断工具。沿着多个视线飞行时间光谱仪测量的聚变产物中子平均动能的偏移提供了速度矢量分量，可以从中推断出热点速度。多次测量改善了热点速度的推论；但是，对可用空间，运营开销和仪器成本的实际考虑限制了可能的视线测量数量。我们为这种经典的“实验设计”问题提出了一种解决方案，该解决方案针对有限数量的测量优化了速度推断的精度。