Optimization of light collection from crystal scintillators for cryogenic experiments

Optimization of light collection from crystal scintillators for cryogenic experiments
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用于低温实验的晶体闪烁体光收集的优化

DOI:
10.1016/j.nima.2014.01.042
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发表时间:
2014
期刊:
Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
通讯作者:
Danevich F
Danevich F
中科院分区:
--
文献类型:
--
作者:
Danevich F

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在闪烁探测器的任何应用中,高的光收集效率是一个重要的要求。本研究的目的是探讨在低温闪烁测辐射热计,这可以被认为是有前途的探测器,在实验中调查中微子双β衰变和暗物质,提高这一参数的可能性。在室温下测量了不同形状(圆柱体20×20 mm和六棱柱体(对角线20 mm,高20 mm))、反射镜材料和形状、光学接触和表面特性(抛光和扩散)的ZnWO4闪烁晶体闪烁探测器的能量分辨率和相对脉冲幅度。在这些实验条件下的光学光子的传播使用Geant 4和ZEMAX代码进行了模拟。模拟的结果被发现是在良好的协议,彼此和直接测量的晶体。这可以应用于低温实验中使用的闪烁探测器的几何优化。
High light collection efficiency is an important requirement in any application of scintillation detectors. The purpose of this study is to investigate the possibility for improving this parameter in cryogenic scintillation bolometers, which can be considered as promising detectors in experiments investigating neutrinoless double beta decay and dark matter. Energy resolutions and relative pulse amplitudes of scintillation detectors using ZnWO4scintillation crystals of different shapes (cylinder ∅ 20×20 mm and hexagonal prism with diagonal 20 mm and height 20 mm), reflector materials and shapes, optical contact and surface properties (polished and diffused) were measured at room temperature. Propagation of optical photons in these experimental conditions was simulated using Geant4 and ZEMAX codes. The results of the simulations are found to be in good agreement with each other and with direct measurements of the crystals. This could be applied to optimize the geometry of scintillation detectors used in the cryogenic experiments.
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