Concept of a novel fast neutron imaging detector based on THGEM for fan-beam tomography applications
Concept of a novel fast neutron imaging detector based on THGEM for fan-beam tomography applications
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DOI：
10.1088/1748-0221/7/02/c02056
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发表时间：
2012-02
影响因子：
1.3
通讯作者：
M. Cortesi;R. Zboray;R. Adams;V. Dangendorf;H. Prasser
中科院分区：
文献类型：
--
作者：
M. Cortesi;R. Zboray;R. Adams;V. Dangendorf;H. Prasser
介绍了一种基于THGEM的新型高效快中子成像探测器的概念设计和工作原理，该探测器可用于未来的扇束透射层析成像。我们报告的可行性研究的基础上的理论建模和计算机模拟的一个可能的探测器配置原型。特别是，我们讨论的结果，关于探测器的几何形状的优化，估计其一般性能，和预期的成像质量：据估计，约5-8%的检测效率可以实现2.5兆电子伏的中子;空间分辨率约为一毫米，没有实质性的退化，由于散射效应。成像系统的预期应用是核能工业无损检测中的中子断层摄影，包括检查乏核燃料棒束、检测爆炸物或药物以及调查热工水力现象（例如，两相流、传热、相变、冷却剂动力学和液态金属流）。
The conceptual design and operational principle of a novel high-efficiency, fast neutron imaging detector based on THGEM, intended for future fan-beam transmission tomography applications, is described. We report on a feasibility study based on theoretical modeling and computer simulations of a possible detector configuration prototype. In particular we discuss results regarding the optimization of detector geometry, estimation of its general performance, and expected imaging quality: it has been estimated that detection efficiency of around 5-8% can be achieved for 2.5 MeV neutrons; spatial resolution is around one millimeter with no substantial degradation due to scattering effects. The foreseen applications of the imaging system are neutron tomography in non-destructive testing for the nuclear energy industry, including examination of spent nuclear fuel bundles, detection of explosives or drugs, as well as investigation of thermal hydraulics phenomena (e.g., two-phase flow, heat transfer, phase change, coolant dynamics, and liquid metal flow).