McEvoy A M, Herrmann H W, Horsfield C J, Young C S, Miller E K, Mack J M, Kim Y, Stoeffl W, Rubery M, Evans S, Sedillo T, Ali Z A
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Rev Sci Instrum. 2010 Oct;81(10):10D322. doi: 10.1063/1.3485083.
Absolute bang time measurements with the gas Cherenkov detector (GCD) and gamma reaction history (GRH) diagnostic have been performed to high precision at the OMEGA laser facility at the University of Rochester with bang time values for the two diagnostics agreeing to within 5 ps on average. X-ray timing measurements of laser-target coupling were used to calibrate a facility-generated laser timing fiducial with rms spreads in the measured coupling times of 9 ps for both GCD and GRH. Increased fusion yields at the National Ignition Facility (NIF) will allow for improved measurement precision with the GRH easily exceeding NIF system design requirements.
在罗切斯特大学的欧米茄激光装置上，利用气体切伦科夫探测器（GCD）和伽马反应历史（GRH）诊断技术对绝对爆轰时间进行了高精度测量，两种诊断技术得到的爆轰时间值平均相差在5皮秒以内。激光与靶耦合的X射线定时测量用于校准由装置产生的激光定时基准，GCD和GRH测量的耦合时间的均方根展宽均为9皮秒。国家点火装置（NIF）聚变产额的增加将提高GRH的测量精度，其精度很容易超过NIF系统的设计要求。
