Millimeter-sized CD foils fielded close (order mm) to inertial confinement fusion (ICF) implosions have been proposed as a game-changer for improving energy resolution and allowing time-resolution in neutron spectrum measurements using the magnetic recoil technique. This paper presents results from initial experiments testing this concept for direct drive ICF at the OMEGA Laser Facility. While the foils are shown to produce reasonable signals, inferred spectral broadening is seen to be high (∼5 keV) and signal levels are low (by ∼20%) compared to expectation. Before this type of foil is used for precision experiments, the foil mount must be improved, oxygen uptake in the foils must be better characterized, and impact of uncontrolled foil motion prior to detection must be investigated.

中文翻译：

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在OMEGA激光设备的直接驱动惯性约束聚变中，使用毫米大小的碳-氘箔片进行高精度的氘-t中子光谱测量

已经提出了接近于惯性约束聚变（ICF）内爆的毫米大小的CD箔片作为改变游戏规则的游戏，以提高能量分辨率并允许使用电磁反冲技术在中子谱测量中实现时间分辨率。本文介绍了在OMEGA激光设备上测试此概念用于直接驱动ICF的初步实验结果。虽然箔片显示出合理的信号，但与预期相比，推断的光谱展宽被认为是很高的（〜5 keV），信号电平很低（〜20％）。在将这种类型的箔用于精密实验之前，必须改善箔的安装角度，必须更好地表征箔中的氧气吸收量，并且必须研究检测前不受控制的箔运动的影响。