Silicon photomultipliers in scintillation detectors used for gamma-ray energies up to 6.1 MeV

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2015-10-01 DOI:10.1109/NSSMIC.2015.7581742

M. Grodzicka, T. Szczesniak, M. Moszynski, L. Swiderski, M. Szawłowski

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引用次数: 5

Abstract

The aim of this paper is to study usefulness of SiPM light readout in detection of gamma rays up to 6.1MeV in combination with various scintillators. The reported measurements were made with 3 samples of one type of Hamamatsu TSV (Through Silicon Via technology) MPPC arrays. These 4×4 channel arrays have a 50×50 μm2 cell size and 12×12 mm2 effective active area. All the tests were done in a climatic chamber. The following scintillators were used: CsI(Tl), CeBr3, NaI(Tl). The studies are focused on optimization of the MPPC performance for practical use in detection of high energy gamma rays. The optimization includes selection of the optimum operating voltage in respect to the energy resolution, verification of the dynamic range, linearity and pulse amplitude. The energy spectra for energies between 320keV and 6.1MeV are presented and compared with data acquired with a classic photomultiplier. Such comparison allowed study of nonlinearity of the tested MPPCs, correction of the energy spectra and proper analysis of the energy resolution. The temperature tests show strong breakdown voltage dependence on the temperature change and define requirements for the stabilization method in real life applications.

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用于伽马射线能量高达6.1兆电子伏特的闪烁探测器中的硅光电倍增管

本文的目的是研究SiPM光读数与各种闪烁体结合检测高达6.1MeV的伽马射线的有用性。本文报道的测量是用一种Hamamatsu TSV (Through Silicon Via technology) MPPC阵列的3个样品进行的。这些4×4通道阵列具有50×50 μm2的单元大小和12×12 mm2的有效有效面积。所有的测试都是在一个气候室里进行的。使用的闪烁体有:CsI(Tl)， CeBr3, NaI(Tl)。研究的重点是优化MPPC在高能伽马射线探测中的实际应用性能。优化包括根据能量分辨率选择最佳工作电压，验证动态范围、线性度和脉冲幅度。给出了320keV ~ 6.1MeV能量范围内的能谱，并与经典光电倍增管数据进行了比较。这样的比较可以研究被测MPPCs的非线性，校正能谱并对能量分辨率进行适当的分析。温度试验表明击穿电压对温度变化有很强的依赖性，并确定了实际应用中稳定方法的要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

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