论文标题
MU3E数据获取
The Mu3e Data Acquisition
论文作者
论文摘要
MU3E实验旨在查找或排除违反衰减的Lepton风味$μ^+\至E^+E^-e^-e^+$，其灵敏度为10 $^{16} $ muon衰变。该实验的第一阶段目前正在Paul Scherrer Institute（瑞士PSI）上进行，该横梁每秒可提供高达10 $^8 $ MUONS的光束。该检测器将由由高压单层活性像素传感器（HV-MAP）制成的超薄像素跟踪器组成，并由闪烁的瓷砖和纤维互补，以进行精确的时机测量。该实验可产生约100 Gbit/s的零抑制数据，这些数据使用FPGA网络和快速的光学链路将其运输到过滤场。在过滤器农场上，使用在图形处理单元上运行的高度平行算法重建轨道和三粒子顶点，从而将数据降低到100 mbyte/s以进行质量存储和离线分析。本文介绍了MU3E数据采集和过滤场的系统设计和硬件实现。
The Mu3e experiment aims to find or exclude the lepton flavour violating decay $μ^+\to e^+e^-e^+$ with a sensitivity of one in 10$^{16}$ muon decays. The first phase of the experiment is currently under construction at the Paul Scherrer Institute (PSI, Switzerland), where beams with up to 10$^8$ muons per second are available. The detector will consist of an ultra-thin pixel tracker made from High-Voltage Monolithic Active Pixel Sensors (HV-MAPS), complemented by scintillating tiles and fibres for precise timing measurements. The experiment produces about 100 Gbit/s of zero-suppressed data which are transported to a filter farm using a network of FPGAs and fast optical links. On the filter farm, tracks and three-particle vertices are reconstructed using highly parallel algorithms running on graphics processing units, leading to a reduction of the data to 100 Mbyte/s for mass storage and offline analysis. The paper introduces the system design and hardware implementation of the Mu3e data acquisition and filter farm.
