arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2310.04098physics.ins-det
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液氩中大规模SiPM阵列单光子探测的前端电子学与最优组合方案

Front-end Electronics and Optimal Ganging Schemes for Single Photon Detection with Large Arrays of SiPMs in Liquid Argon

P. Carniti, E. Cristaldo, A. Falcone, C. Gotti, G. Pessina, F. Terranova

AI总结:

针对液氩中大规模SiPM阵列的单光子探测需求,提出了一种估算最优SiPM串并联组合方案的简单模型,结合自研低噪声低温放大器验证了模型有效性,实现了大面积SiPM的高灵敏度单光子探测。

摘要:

在惰性液体储罐中运行大规模硅光电倍增器(SiPM)阵列,需要能够在低温环境下可靠工作的低噪声、低功耗前端放大器。合适的放大器必须搭配恰当的SiPM组合方案,即在其输入端对SiPM进行串/并联组合。本文提出了一种简单模型,在已知SiPM和放大器的基本电学特性时,可估算出能获得最佳信噪比的组合方案。为验证该模型的有效性,我们使用了一款基于分立元件的放大器,该放大器在液氮温度下的白电压噪声为0.25-0.37 nV/√Hz,功耗为2-5 mW。结合通过该模型得到的最优组合方案,该放大器在多达96个6x6 mm²的SiPM(总面积34.6 cm²,信噪比S/N ≈ 8-11)上展现出优异的单光子灵敏度。测量结果与计算值吻合良好,预示着在更大面积下也有望实现光电子峰的清晰分离。

英文摘要:

The operation of large arrays of silicon photomultipliers (SiPM) in tanks of noble liquids requires low noise, low power front-end amplifiers, able to operate reliably in the cryogenic environment. A suitable amplifier needs to be paired with a proper SiPM ganging scheme, meaning the series/parallel combination of SiPMs at its input. This paper presents a simple model to estimate the ganging scheme that gives the best signal to noise ratio once the basic electrical characteristics of the SiPM and amplifier are known. To prove the validity of the model, we used an amplifier based on discrete components, which achieves a white voltage noise in the 0.25-0.37 nV/$\surd$Hz range at liquid nitrogen temperature, while drawing 2-5 mW of power. Combined with the optimal ganging scheme obtained with the model, the amplifier demonstrated excellent single photon sensitivity up to 96 6x6 mm$^2$ SiPMs (total area 34.6 cm$^2$, S/N $\simeq$ 8-11). The measured results are in a good match with calculated values, predicting the possibility to achieve a clear separation of photoelectron peaks also with larger areas.

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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