论文标题
MU3E实验的闪烁纤维正时检测器的开发
Development of the Scintillating Fiber Timing Detector for the Mu3e Experiment
论文作者
论文摘要
我们介绍并讨论紧凑型闪烁纤维（SCIFI）检测器的发育和性能，以在MU3E实验中以非常高的颗粒速率使用。使用多通道硅光构层（SIPM）阵列读取SCIFI检测器，以达到最佳的计时性能。 MU3E是Paul Scherrer Institute准备的一个新实验，在罕见的中性中心含Muon Decay Mu-> eee中，使用世界上最强烈的连续表面MUON束在罕见的中性中心的Muon Decay Mu-> eee中寻找带电的Lepton风味。 MU3E检测器基于薄薄的高压单层活性硅像素传感器（HV-MAPS），可与闪烁的纤维结合使用，以非常精确的跟踪，并与Sipms耦合到SIPMS，以进行准确的时机测量值，并设计以在非常高的强度下运行。 为了达到这种稀有的Mu-> eee Muon衰减的单个事件灵敏度为10^-16，所有背景都必须拒绝以下。为了抑制所有形式的意外背景，Scifi检测器（厚度<0.2％的辐射长度X_0），时间分辨率为250 PS，效率超过96％，并且已经开发出100微米的空间分辨率。在本文中，我们报告了该科幻检测器的开发，构建和性能。已经评估了不同的闪烁纤维类型，并已经测试了各种装配程序以实现最佳性能。 紧凑的尺寸，快速响应，良好的时机，高空间分辨率，对磁场不敏感和适应性的几何形状使Scifi探测器适合各种应用。
We present and discuss the development and performance of a compact scintillating fiber (SciFi) detector for timing to be used in the Mu3e experiment at very high particle rates. The SciFi detector is read out with multichannel silicon photomuiltipliers (SiPM) arrays at both ends to achieve the best timing performance. Mu3e is a new experiment under preparation at the Paul Scherrer Institute to search for charged Lepton Flavor Violation in the rare neutrinoless muon decay mu->eee using the most intense continuous surface muon beam in the world. The Mu3e detector is based on thin high-voltage monolithic active silicon pixel sensors (HV-MAPS) for very precise tracking in conjunction with scintillating fibers and scintillating tiles coupled to SiPMs for accurate timing measurements and it is designed to operate at very high intensities. In order to reach a single event sensitivity of 10^-16 for this rare mu->eee muon decay, all backgrounds must be rejected well below this level. To suppress all forms of accidental background, a very thin SciFi detector (thickness < 0.2% of a radiation length X_0) with a time resolution of 250 ps, efficiency in excess of 96%, and spatial resolution of 100 micron has been developed. In this paper we report on the development, construction, and performance of this SciFi detector. Different scintillating fiber types have been evaluated and various assembly procedures have been tested to achieve the best performance. The compact size, fast response, good timing, high spatial resolution, insensitivity to magnetic fields, and adaptable geometry make SciFi detectors suitable for a variety of applications.
