CEE实验中TOF探测器数据获取系统的设计

正在研制的低温高密度核物质测量谱仪(CSR External-target Experiment，CEE)系统经过触发后平均数据率可达2 GB/s。针对整个谱仪的设计需求，本文提出了通用的流处理数据获取架构Data-Matrix (D-Matrix)，并设计了D-Matrix在飞行时间探测器(Time-of-Flight，TOF)子系统应用的具体方案。TOF系统的数据获取(Data Acquisition，DAQ)系统中使用光纤、PCIe总线等高速串行通信方式完成从前端电子学(Front End Electronic, FEE)到服务器阵列的数据传输，并通过具有统一接口的流处理节点的部署和级联来完成事例组装、命令路由、状态实时监测和数据显示与存储等任务。除此之外，TOF系统的数据获取系统在硬件和逻辑设计上具有良好的通用性，可以兼容其他子探测器系统，并应用于CEE实验的全局系统中。

Design of Data Acquisition System for TOF Detectors in the CEE Experiment

The CSR External-target Experiment(CEE) system under development may reach an average data rate of 2 GB/s after being triggered. In response to the design requirements of the entire spectrometer, a generic stream processing data acquisition architecture D-Matrix is put forward in the article, and a specific scheme of D-Matrix in the Time-of-Flight detector(TOF) subsystem is proposed. The DAQ of the TOF system uses high-speed serial communication methods such as optical fiber and PCIe bus to complete data transmission from Front-End Electronics(FEE) to the servers, and deploys and cascades stream processing nodes with a unified interface to complete event building, command routing, Real-time status monitoring and displaying and data storage tasks. In addition, the DAQ of the TOF system has strong versatility in hardware and logic design, it also can be compatible with other sub-detector systems, and can be further applied to the global system of CEE experiments.