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arXiv 1502.07837physics.ins-dethep-exnucl-ex
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nEXO用硅光电倍增器的特性研究

Characterization of Silicon Photomultipliers for nEXO

I. Ostrovskiy, F. Retiere, D. Auty, J. Dalmasson, T. Didberidze, R. DeVoe, G. Gratta, L. Huth, L. James, L. Lupin-Jimenez, N. Ohmert, A. Piepke

摘要:

硅光电倍增器(SiPM)是用于下一代液体氙双β衰变实验(如nEXO)的光探测器的有吸引力的候选者。在本文中,我们讨论了SiPM必须满足的要求,以适合nEXO和类似的实验,描述了两个测试设置由nEXO合作,并提出了SiPM的表征结果从几个供应商。特别是,我们发现,在氙闪烁光发射的峰值(175-178 nm)的光子探测效率接近nEXO要求测试FBK和滨松设备。此外,nEXO合作团队使用中子活化分析对几克裸露的FBK设备进行了放射性分析,表明40 K,232 Th和238 U的水平分别为<0.15,(6.9e10-4 - 1.3e10-2)和<0.11 mBq/kg。

英文摘要:

Silicon Photomultipliers (SiPMs) are attractive candidates for light detectors for next generation liquid xenon double-beta decay experiments, like nEXO. In this paper we discuss the requirements that the SiPMs must satisfy in order to be suitable for nEXO and similar experiments, describe the two test setups operated by the nEXO collaboration, and present the results of characterization of SiPMs from several vendors. In particular, we find that the photon detection efficiency at the peak of xenon scintillation light emission (175-178 nm) approaches the nEXO requirements for tested FBK and Hamamatsu devices. Additionally, the nEXO collaboration performed radioassay of several grams of bare FBK devices using neutron activation analysis, indicating levels of 40K, 232Th, and 238U of the order of <0.15, (6.9e10-4 - 1.3e10-2), and <0.11 mBq/kg, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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