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arXiv physics/0307006physics.ins-det
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ZEUS微顶点检测器DAQ的结构及二级全局航迹触发器

The Architecture of the ZEUS Micro Vertex Detector DAQ and Second Level Global Track Trigger

Alessandro Polini

摘要:

介绍了ZEUS微型顶点探测器数据采集系统的结构及其二级触发器ZEUS全局跟踪触发器的实现。来自顶点检测器HELIX读出芯片的数据(对应于200 k通道)由3箱ADC数字化,这些ADC执行噪声和消隐以及数据抑制和压缩。PowerPC VME板计算机通过快速和千兆以太网网络连接推送集群数据进行二级触发处理,并剥离数据进行事件构建。来自中央跟踪室和前吸管跟踪器的附加跟踪信息被连接到全球跟踪触发器的12个双CPU PC场,在那里进行跟踪和顶点查找。系统以ZEUS第一级触发速率(~ 500 Hz)进行数据驱动,并且必须在平均10 ms时间后生成触发结果。

英文摘要:

The architecture of the ZEUS Micro Vertex Detector data acquisition system and the implementation of its second level trigger, the ZEUS Global Track Trigger are described. Data from the vertex detectors HELIX read-out chips, corresponding to 200k channels, are digitized by 3 crates of ADCs which perform noise and pedestal subtraction, and data suppression and compaction. PowerPC VME board computers push cluster data for second level trigger processing and strip data for event building via Fast and Gigabit Ethernet network connections. Additional tracking information from the central tracking chamber and the forward straw tube tracker are interfaced into the 12 dual CPU PC farm of the Global Track Trigger where track and vertex finding is performed. The system is data driven at the ZEUS first level trigger rate (~500Hz) and must generate a trigger result after a mean time of 10ms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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