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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment >A multi-purposed detector with silicon photomultiplier readout of scintillating fibers
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A multi-purposed detector with silicon photomultiplier readout of scintillating fibers

机译：具有闪烁光纤硅光电倍增管读数的多功能探测器

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摘要

Today, high position and timing resolutions can be simultaneously achieved using scintillating fibers coupled to silicon photomultipliers. In the framework of the MEGII experiment (MEG upgrade) which searches for the μ~+ →e~+γ decay we are developing an active muon stopping target of 250 μm square scintillating fibers coupled to silicon photomultipliers. This tool should provide an unique way to continuously monitor the beam (detecting the stopped muons) at the highest muon beam intensities in the world, and to measure the muon decay vertex (detecting the outgoing positron). A similar technology will also be applicable to the Mu3e experiment which searches for the μ~+ →e~+e~-e~+ decay. In this experiment a timing hodoscope, which complements the silicon tracker, will be made by few layers of 250 μm square or round scintillating fibers, providing timing measurements with a resolution ＜ 1 ns. In this work we report the results obtained with the current prototypes showing that spatial resolutions at a level of 70 μm and timing resolutions of the order of 350 ps can be reached with a detection efficiency ≥ 90%.
机译：如今，使用耦合到硅光电倍增管的闪烁光纤可以同时实现高位置分辨率和定时分辨率。在寻找μ〜→e〜+γ衰变的MEGII实验（MEG升级）的框架中，我们正在开发250μm方形闪烁纤维与硅光电倍增管耦合的有源μon截止靶。该工具应提供一种独特的方法，以世界上最高的μ子束强度连续监视射束（检测停止的μ子），并测量μ子衰减顶点（检测出射的正电子）。类似的技术也将适用于Mu3e实验，该实验搜索μ〜+→e〜+ e〜-e〜+衰减。在本实验中，将由几层250μm方形或圆形闪烁光纤构成一个定时跟踪镜，以补充硅跟踪器，从而提供分辨率＜1 ns的定时测量。在这项工作中，我们报告了使用当前原型获得的结果，这些结果表明，在检测效率≥90％的情况下，可以达到70μm级别的空间分辨率和350 ps量级的定时分辨率。

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