Fast neutron coded-aperture imaging of special nuclear material configurations
Fast neutron coded-aperture imaging of special nuclear material configurations
复制标题
特殊核材料构型的快速中子编码孔径成像
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
R. J. Newby
中科院分区：
文献类型：
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作者：
P. Hausladen;M. Blackston;E. Brubaker;D. Chichester;P. Marleau;R. J. Newby
在过去一年中，研制了一个原型快中子编码孔径成像仪，它具有足够的效率和分辨率，可以通过裂变中子发射量对弹头进行计数，以便在未来可能的条约确认情况下进行实际操作。成像器由定制的像素化液体闪烁体探测器构成。液体闪烁体探测器能够通过脉冲形状进行中子-伽马鉴别，并且像素化构造能够在具有可管理数量的读出电子器件通道的紧凑探测器中实现用于成像的足够数量的像素。该成像仪已用于对ORNL的中子源、爱达荷州国家实验室（INL）零功率物理反应堆（ZPPR）设施的特殊核材料（SNM）源以及桑迪亚国家实验室的中子源和屏蔽配置进行成像。本文报告的设计和建造的成像仪，表征测量与中子源在ORNL，和测量与SNM在INL ZPPR设施。
In the past year, a prototype fast-neutron coded-aperture imager has been developed that has sufficient efficiency and resolution to make the counting of warheads for possible future treaty confirmation scenarios via their fission-neutron emissions practical. The imager is constructed from custom-built pixelated liquid scintillator detectors. The liquid scintillator detectors enable neutron-gamma discrimination via pulse shape, and the pixelated construction enables a sufficient number of pixels for imaging in a compact detector with a manageable number of channels of readout electronics. The imager has been used to image neutron sources at ORNL, special nuclear material (SNM) sources at the Idaho National Laboratory (INL) Zero Power Physics Reactor (ZPPR) facility, and neutron source and shielding configurations at Sandia National Laboratories. This paper reports on the design and construction of the imager, characterization measurements with neutron sources at ORNL, and measurements with SNM at the INL ZPPR facility.