An improved method of unfolding neutron TOF spectrum for low ion temperature inertial confinement fusion

作     者：宋仔峰 唐琦 刘中杰 詹夏宇 陈家斌 

作者机构：Research Center of Laser Fusion China Academy of Engineering Physics 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2014年第38卷第6期

页      面：50-54页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 08[工学] 0708[理学-地球物理学] 070203[理学-原子与分子物理] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0703[理学-化学] 0704[理学-天文学] 0702[理学-物理学] 

主　　题：time-of-flight detector deconvolution low-pass filter power spectrum 

摘      要：The fuel ion temperature in inertial confinement fusion can be determined from the neutron energy spectrum. For the implosion experiment with low neutron yield, and thus low signal-to-noise ratio, a new technique to unfold the neutron energy spectrum from the observed neutron time-of-flight signal is presented in this paper. This method uses a low-pass filter to remove noise from the signal with a threshold value determined by power spectrum analysis. This technique has been applied to the analysis of the observed neutron time-of-flight signals in the indirect drive implosion experiment conducted on Shenguang III prototype laser facility, and fuel ion temperatures of about 1.0 keV are obtained.