浸没式SiPM阵列在液体闪烁体中从室温到$-30\\,^{\circ}\mathrm{C}$的特性表征
Characterization of immersed SiPM arrays in liquid scintillator between room temperature and $-30\,^{\circ}\mathrm{C}$
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中文总结 AI 辅助
本研究表征了浸没在液体闪烁体中的SiPM阵列从室温至-30°C的性能，发现冷却使暗计数率降低13.5倍、光产额提升16.7%，并测得μ子寿命1959纳秒，验证了低温运行的可行性。
中文摘要 AI 辅助
配备分布式硅光电倍增管（SiPM）阵列的液体闪烁体探测器可用于紧凑型、对拓扑敏感且低本底的实验，但直接浸没在闪烁介质中的SiPM的温度依赖性尚未被广泛表征。我们报告了一个125升线性烷基苯基液体闪烁体探测器的运行情况，该探测器由浸没在活性体积中的125个SiPM通道读出，温度范围从室温到$-30\\,^{\circ}\mathrm{C}$。探测器响应通过宇宙射线μ子进行测量，包括随后发生米歇尔电子衰变的停止μ子。从$+15\\,^{\circ}\mathrm{C}$冷却到$-30\\,^{\circ}\mathrm{C}$使SiPM暗计数率降低了13.5倍，单光电子响应提高了49.1%，宇宙射线μ子光产额增加了16.7%。低温下改进的光电子分离和基线稳定性使得能够选择停止μ子事件，由此测得的有效μ子寿命为$1959\pm132\\,\mathrm{ns}$，与考虑碳上$\mu^{-}$俘获后碳氢闪烁体的预期值一致。
英文摘要
Liquid scintillator detectors instrumented with distributed silicon photomultiplier (SiPM) arrays can be used in compact, topology-sensitive, and low-background experiments, but the temperature dependence of SiPMs immersed directly in the scintillation medium has not been widely characterized. We report the operation of a 125-liter linear-alkylbenzene-based liquid scintillator detector read out by 125 SiPM channels immersed in the active volume, over the range from room temperature to $-30\,^{\circ}\mathrm{C}$. The detector response was measured with cosmic-ray muons, including stopping muons followed by their Michel-electron decay. Cooling from $+15\,^{\circ}\mathrm{C}$ to $-30\,^{\circ}\mathrm{C}$ reduced the SiPM dark-count rate by a factor of 13.5, increased the single-photoelectron response by 49.1%, and increased the cosmic-ray muon light yield by 16.7%. The improved photoelectron separation and baseline stability at low temperature enabled a selection of stopping-muon events, from which the effective muon lifetime was measured to be $1959\pm132\,\mathrm{ns}$, consistent with the value expected for a hydrocarbon scintillator once $μ^{-}$ capture on carbon is taken into account.
发表机构
- Chung-Ang University（中央大学）
- Institute for Basic Science (IBS)（基础科学研究院）
- University of Science and Technology (UST)（科学技术大学）
机构由 AI 辅助整理，请以论文原文为准。
