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

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 i...

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Bibliographic Details
Published in:Chinese physics C 2014-06, Vol.38 (6), p.50-54
Main Author: 宋仔峰 唐琦 刘中杰 詹夏宇 陈家斌
Format: Article
Language:English
Subjects:
Fuels
Implosions
Inertial confinement fusion
Ion temperature
Lasers
Low pass filters
Noise
Signal to noise ratio
中子能谱
低信噪比
低通滤波器
内爆实验
功率谱分析
惯性约束聚变
离子温度
飞行时间谱
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Summary: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.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/38/6/066201