用于CBM-TOF超级模块探测器质量控制的分布式数据读出方法  

A distributed data readout method for quality control of CBM-TOF super module detector

作　　者：张雅希 曹平[1,3] 黄锡汝 郑佳俊[1,2] 蒋荻[1,2] 安琪[1,2] 

机构地区：[1]中国科学技术大学核探测与核电子学国家重点实验室,合肥230026 [2]中国科学技术大学近代物理系,合肥230026 [3]中国科学技术大学核科学技术学院,合肥230026

出　　处：《核技术》2017年第6期49-55,共7页Nuclear Techniques

基　　金：国家重点基础研究发展计划(973计划)项目(No.2015CB856906);中国工程物理研究院中子物理重点实验室基金(No.2014AC03)资助~~

摘　　要：高压缩重子物质(Compressed Baryonic Matter,CBM)实验装置飞行时间谱仪利用由多气隙电阻板室(Multi-gap Resistive Plate Chamber,MRPC)探测器构建的超级模块实现高密度、高精度的粒子飞行时间测量,该超级模块可支持高达320通道的高精度时间测量能力,数据率高达6 Gbit·s^(-1)。为实现超级模块探测器的性能评估,提出一种基于千兆以太网的分布式数据读出方法,利用片上系统技术实现读出节点的千兆网络传输能力。测试结果表明,针对单条数据传输路径,原型读出模块在全链路情况下,能实现约467 Mbit·s-1的综合数据传输速率。读出方案中事例组装、命令发送、状态显示等功能均运行正常。Background： The time-of-flight （TOF） detector is a key component in the compressed baryonic matter （CBM） experiment at the facility for antiproton and ion research （FAIR）. It utilizes super module detectors to achieve high-denseness, high-precision particle flight time measurement. Each super module supports up to 320 channels of high-precision time measurement capabilities, and the data transfer will reach up to 6-Gbit.s-1 peak rate. Purpose： This study aims at the quality control of data readout system for CBM-TOF super module. Methods： First of all, the background and readout methods in similar TOF detectors were introduced. Then a distributed data readout method and related software framework was proposed to meet the quality control readout requirements by using the system on chip （SOC） techniques. Finally, a prototype software was implemented under Linux operating system to test and verify the feasibility of the distributed data readout method. Results： The read-out board （ROB） prototype module fora single data transmission path achieved approximate 467-Mbit· s-1 data transfer rate in the case of fulMink. Both data acquisition and status monitoring of each component of CBM-TOF were implemented properly in the software. Conclusion： The distributed data readout method and the related prototype software implementation can be used for quality control of CBM-TOF super module readout.

关 键 词：CBM-TOF超级模块 分布式数据传输 千兆以太网 

分 类 号：TL8[核科学技术—核技术及应用]