Lerche R A, Glebov V Yu, Moran M J, McNaney J M, Kilkenny J D, Eckart M J, Zacharias R A, Haslam J J, Clancy T J, Yeoman M F, Warwas D P, Sangster T C, Stoeckl C, Knauer J P, Horsfield C J
Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA.
Rev Sci Instrum. 2010 Oct;81(10):10D319. doi: 10.1063/1.3478680.
The first 3 of 18 neutron time-of-flight (nTOF) channels have been installed at the National Ignition Facility (NIF). The role of these detectors includes yield, temperature, and bang time measurements. This article focuses on nTOF data analysis and quality of results obtained for the first set of experiments to use all 192 NIF beams. Targets produced up to 2×10(10) 2.45 MeV neutrons for initial testing of the nTOF detectors. Differences in neutron scattering at the OMEGA laser facility where the detectors were calibrated and at NIF result in different response functions at the two facilities. Monte Carlo modeling shows this difference. The nTOF performance on these early experiments indicates that the nTOF system with its full complement of detectors should perform well in future measurements of yield, temperature, and bang time.
国家点火装置（NIF）已安装了18个中子飞行时间（nTOF）通道中的前3个。这些探测器的作用包括产额、温度和爆轰时间测量。本文重点关注nTOF数据分析以及在首次使用NIF全部192束激光束的实验中所获得结果的质量。靶产生了高达2×10(10)个2.45兆电子伏的中子用于nTOF探测器的初始测试。探测器在校准的OMEGA激光装置和NIF处的中子散射差异导致两个装置的响应函数不同。蒙特卡罗模拟显示了这种差异。这些早期实验中的nTOF性能表明，配备齐全探测器的nTOF系统在未来的产额、温度和爆轰时间测量中应能表现良好。
