Conceptual design and first results for a neutron detector with interaction localization capabilities

Conceptual design and first results for a neutron detector with interaction localization capabilities
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具有交互定位功能的中子探测器的概念设计和初步结果

DOI:
10.1016/j.nima.2019.162528
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发表时间:
2019
期刊:
Detectors and Associated Equipment
影响因子:
--
通讯作者:
Engelhardt, A.R.
Engelhardt, A.R.
中科院分区:
--
文献类型:
--
作者:
Heideman, J.;Pérez-Loureiro, D.;Grzywacz, R.;Thornsberry, C.R.;Chan, J.;Heilbronn, L.H.;Neupane, S.K.;Schmitt, K.;Rajabali, M.M.;Engelhardt, A.R.

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提出了一种新的高精度探测器,用于研究β缓发中子发射和直接反应研究中的中子。具有多中子(表示为Xn)跟踪(NEXT)阵列的中子探测器被设计成保持高的本征中子探测效率,同时减少中子能量测量中的不确定性。单个NEXT模块由塑料闪烁体的薄段组成,每个塑料闪烁体都是光学分离的,能够区分中子-伽马。每个分段的模块耦合到位置敏感的光电探测器,使得能够高精度地确定中子到达时间和有效体积内的相互作用位置。设计研究已经进行了模拟和实验测试的基础上,导致原型单位的建设。给出了使用252 Cf中子源和加速器产生的单能中子进行测量的第一批结果。
A new high-precision detector for studying neutrons from beta-delayed neutron emission and direct reaction studies is proposed. The Neutron dEtector with multi-neutron (denoted Xn) Tracking (NEXT) array is designed to maintain high intrinsic neutron detection efficiency while reducing uncertainties in neutron energy measurements. A single NEXT module is composed of thin segments of plastic scintillator, each optically separated, capable of neutron-gamma discrimination. Each segmented module is coupled to position sensitive photodetectors enabling the high-precision determination of neutron time of arrival and interaction position within the active volume. A design study has been conducted based on simulations and experimental tests leading to the construction of prototype units. First results from measurements using a252Cf neutron source and accelerator-produced monoenergetic neutrons are presented.
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