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Applied Physics 2022
连接闪烁屏和光电传感器的间隙材料对探测器性能影响研究
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Abstract:
间接式X射线探测器中闪烁屏和光电传感器的直接连接一般有压制和耦合两种工艺，其间隙材料可分别为空气和硅油。本文基于Geant4工具包建立微通道阵列式CsI:Tl闪烁体探测器模型，讨论两种间隙材料及其厚度对探测器光输出和调制传递函数的影响。给出了探测器在两种材料条件下的光输出，以及不同材料厚度下的空间分辨率。结果对后续的探测器性能评估具有重要意义。
The direct connection between the scintillation screen and the photoelectric sensor in the indirect X-ray detector generally has two processes: pressing and coupling, and the gap materials can be air and silicone oil, respectively. In this paper, a microchannel array CsI:Tl scintillator detector model is established based on the Geant4 toolkit, and the effects of two gap materials and their thicknesses on the light output and the modulation transfer function of the detector are discussed. The light output of the detector under the conditions of two materials and the spatial resolution under different material thicknesses are given. The results are of great significance for subsequent detector performance evaluation.
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