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用于原位基于 SiPM 的辐射探测的具有温度补偿和高效数据管理的紧凑型后端电子学。

Compact Back-End Electronics with Temperature Compensation and Efficient Data Management for In Situ SiPM-Based Radiation Detection.

机构信息

Engineering Department, Lancaster University, Lancaster LA1 4YW, UK.

Central Laboratory, National Nuclear Laboratory Ltd., Warrington WA3 6AE, UK.

出版信息

Sensors (Basel). 2023 Apr 17;23(8):4053. doi: 10.3390/s23084053.

DOI:10.3390/s23084053
PMID:37112392
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10141715/
Abstract

A compact back-end interface for silicon photomultipliers (SiPMs) implementing Zener diode-based temperature compensation has been developed for the remote detection of beta and gamma radiation. Remote detection is facilitated by the development of an efficient data management system utilising MySQL database storage for recording periodic spectra data for wireless access over a private Wi-Fi network. A trapezoidal peak shaping algorithm has been implemented on an FPGA for the continuous conversation of pulses from the SiPM, signifying the detection of a radiological particle, into spectra. This system has been designed to fit within a 46 mm cylindrical diameter for in situ characterization, and can be attached to one or more SiPMs used in conjunction with a range of scintillators. LED blink tests have been used to optimise the trapezoidal shaper coefficients to maximise the resolution of the recorded spectra. Experiments with an array of SiPMs integrated with a NaI(Tl) scintillator exposed to sealed sources of Co-60, Cs-137, Na-22 and Am-241 have shown that the detector achieves a peak efficiency of 27.09 ± 0.13% for a gamma peak at 59.54 keV produced by Am-241, and a minimum energy resolution (Delta E/E) of 4.27 ± 1.16% for the 1332.5 keV gamma peak from Co-60.

摘要

已经为基于齐纳二极管的温度补偿的硅光电倍增管 (SiPM) 开发了紧凑的后端接口，用于远程探测β和γ辐射。通过开发高效的数据管理系统，利用 MySQL 数据库存储来记录周期性的谱数据，以便通过专用的 Wi-Fi 网络进行无线访问，从而实现远程检测。在 FPGA 上实现了梯形脉冲整形算法，用于将来自 SiPM 的脉冲（表示放射性粒子的检测）连续转换为光谱。该系统设计成适合在 46 毫米圆柱形直径内进行原位特性化，并且可以与一个或多个 SiPM 一起使用，同时与一系列闪烁体结合使用。已经使用 LED 闪烁测试来优化梯形整形器系数，以最大限度地提高记录光谱的分辨率。用与 NaI(Tl)闪烁体集成的 SiPM 阵列进行的实验表明，探测器对于由 Am-241 产生的 59.54keV 的γ峰达到 27.09±0.13%的峰值效率，并且对于 Co-60 的 1332.5keVγ峰，具有 4.27±1.16%的最小能量分辨率 (Delta E/E)。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3212/10141715/63dd80b6be61/sensors-23-04053-g019.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3212/10141715/c168b562196f/sensors-23-04053-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3212/10141715/63dd80b6be61/sensors-23-04053-g019.jpg

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Appl Radiat Isot. 2021 Oct;176:109900. doi: 10.1016/j.apradiso.2021.109900. Epub 2021 Aug 18.
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State-of-the-Art Mobile Radiation Detection Systems for Different Scenarios.用于不同场景的最先进的移动辐射探测系统。
Sensors (Basel). 2021 Feb 4;21(4):1051. doi: 10.3390/s21041051.