Results from the coded aperture neutron imaging system

P. Marleau, J. Brennan, E. Brubaker, J. Steele
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引用次数: 14

Abstract

Because of their penetrating power, energetic neutrons and gamma rays (∼1 MeV) offer the best possibility of detecting highly shielded or distant special nuclear material (SNM). Of these, fast neutrons offer the greatest advantage due to their very low and well understood natural background. We are investigating a new approach to fast-neutron imaging — a coded aperture neutron imaging system (CANIS). Coded aperture neutron imaging should offer a highly efficient solution for improved detection speed, range, and sensitivity. We have demonstrated fast neutron and gamma ray imaging with several different configurations of coded masks patterns and detectors including an “active” mask that is composed of neutron detectors. Here we describe our prototype detector and present some initial results from laboratory tests and demonstrations.
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编码孔径中子成像系统的结果
由于它们的穿透力,高能中子和伽马射线(~ 1 MeV)提供了探测高度屏蔽或遥远特殊核材料(SNM)的最佳可能性。其中,快中子提供了最大的优势,因为它们的自然背景非常低,很容易理解。我们正在研究一种新的快中子成像方法——编码孔径中子成像系统(CANIS)。编码孔径中子成像为提高探测速度、范围和灵敏度提供了一种高效的解决方案。我们已经演示了快中子和伽马射线成像与几种不同配置的编码掩模模式和探测器,包括一个由中子探测器组成的“主动”掩模。在这里,我们描述了我们的原型探测器,并介绍了一些实验室测试和演示的初步结果。
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