X-ray tests of a microchannel plate detector and amorphous silicon pixel array readout for neutron radiography
X-ray tests of a microchannel plate detector and amorphous silicon pixel array readout for neutron radiography
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DOI：
10.1016/j.nima.2006.11.055
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发表时间：
2007-03
影响因子：
1.4
通讯作者：
R. Ambrosi;R. Street;B. Feller;G. Fraser;J. Watterson;R. Lanza;J. Dowson;D. Ross;A. Martindale;A. Abbey;D. Vernon
中科院分区：
文献类型：
--
作者：
R. Ambrosi;R. Street;B. Feller;G. Fraser;J. Watterson;R. Lanza;J. Dowson;D. Ross;A. Martindale;A. Abbey;D. Vernon
目前还不存在用于5- 14 MeV能量范围内的快中子的高性能大面积成像探测器。该项目的目的是将传统上用于图像增强器和X射线探测器的微通道板或MCP（或类似的电子倍增结构）与非晶硅（a-Si）像素阵列相结合，以产生复合转换器和增强器位置敏感成像系统。这种探测器将提供一个数量级的改善，在图像分辨率相比，目前毫米分辨率的限制，获得使用荧光粉或闪烁器的富氢转换器。在这项研究中，我们提出的原型系统的初步实验评估的结果。这项研究是使用医用X射线源进行概念验证测试的，下一阶段将涉及中子成像测试。在这项研究中描述的混合探测器是一个独特的发展，并铺平了道路，大面积的位置敏感探测器组成的MCP或微球板探测器和a-Si或多晶硅像素阵列。应用包括用于地面应用的中子和X射线成像。该技术可以扩展到X射线天文学的空间仪器。
High-performance large area imaging detectors for fast neutrons in the 5–14MeV energy range do not exist at present. The aim of this project is to combine microchannel plates or MCPs (or similar electron multiplication structures) traditionally used in image intensifiers and X-ray detectors with amorphous silicon (a-Si) pixel arrays to produce a composite converter and intensifier position sensitive imaging system. This detector will provide an order of magnitude improvement in image resolution when compared with current millimetre resolution limits obtained using phosphor or scintillator-based hydrogen rich converters. In this study we present the results of the initial experimental evaluation of the prototype system. This study was carried out using a medical X-ray source for the proof of concept tests, the next phase will involve neutron imaging tests. The hybrid detector described in this study is a unique development and paves the way for large area position sensitive detectors consisting of MCP or microsphere plate detectors and a-Si or polysilicon pixel arrays. Applications include neutron and X-ray imaging for terrestrial applications. The technology could be extended to space instrumentation for X-ray astronomy.