CCD相机对14 MeV和2.5 MeV中子瞬态响应特性

段宝军; 马继明; 宋顾周; 宋岩; 周鸣; 黑东炜; 韩长材; 姚志明

doi:doi:10.3788/hplpb201426.034004

强激光与粒子束, 2014, 26 (3): 034004, 网络出版: 2014-03-31

CCD相机对14 MeV和2.5 MeV中子瞬态响应特性

Transient response of CCD cameras to 14 MeV and 2.5 MeV neutrons

论文大纲

段宝军 ^*马继明宋顾周宋岩周鸣黑东炜韩长材姚志明

作者单位

西北核技术研究所, 西安 710024

CCD相机瞬态干扰噪声中子射线成像 CCD camera transient noise neutron radiography

摘要

从理论上分析了中子在CCD相机拍摄图像中引起的瞬态干扰噪声的机理,并针对两种不同类型的CCD相机,在能量为14 MeV和2.5 MeV的低强度稳态中子源上开展了实验研究,分析了噪声特征与入射中子能量、入射角度、注量及CCD相机结构的关系。实验结果表明中子瞬态干扰噪声主要表现为脉冲噪声,且出现斑点现象,与理论分析结果相吻合。研究得出了噪声特征随入射中子注量变化的规律,比较了不同能量及不同入射角条件下的噪声特性,并分析了两种不同结构的CCD相机响应特性的差别。

Abstract

The mechanism of transient noise of CCD cameras induced by neutrons was analyzed. On the neutron beams of 14 MeV and 2.5 MeV, the transient noise of two different CCD cameras was measured at different fluences and different incidence angles. The preliminary results were drawn from the experiment. Transient noise induced by neutron usually appears as sharp spikes or impulses affecting one or a small cluster of pixels. The results are consistent with theoretical estimates. We also obtained the variation characteristics of transient noise induced by neutrons of different fluences, or different energies, or different incidence angles. In addition, we investigated the transient noise as a function of the size of CCD pixel.

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段宝军, 马继明, 宋顾周, 宋岩, 周鸣, 黑东炜, 韩长材, 姚志明. CCD相机对14 MeV和2.5 MeV中子瞬态响应特性[J]. 强激光与粒子束, 2014, 26(3): 034004. Duan Baojun, Ma Jiming, Song Guzhou, Song Yan, Zhou Ming, Hei Dongwei, Han Changcai, Yao Zhiming. Transient response of CCD cameras to 14 MeV and 2.5 MeV neutrons[J]. High Power Laser and Particle Beams, 2014, 26(3): 034004.

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