Ethernet-based data acquisition system for the DØ experiment at fermilab

B. Angstadt, G. Brooijmans, D. Chapin, D. Charak, M. Clements, D. Cutts, A. Haas, R. Hauser, M. Johnson, A. Kulyavtsev, S. Mattingly, M. Mulders, P. Padley, D. Petravick, R. Rechenmacher, G. Watts, D. Zhang

    Research output: Contribution to journalConference articlepeer-review


    The DØ detector at Fermilab has been collecting data with its new, Ethernet-based Data Acquisition (DAQ) System since spring 2002. The system was built almost exclusively with commercially available components, and designed to read in event fragments at a rate of 1 kHz from about 70 VME crates, assemble the events with a typical size of 250 kB and pass them to the Level 3 trigger farm, composed of about 160 CPUs, for final event selection. Accepted events are sent to the online system to be stored on tape at an average rate of 50 Hz. The event fragments are read out over VME using Single Board Computers (SBCs) and sent to the trigger farm through 100 Mb/s and 1 Gb/s Ethernet connections via a series of Ethernet switches. This paper gives an overview of the main components of the DAQ and trigger system and reports on its performance during the first year of operation.

    Original languageEnglish (US)
    Article numberN31-1
    Pages (from-to)961-963
    Number of pages3
    JournalIEEE Nuclear Science Symposium Conference Record
    StatePublished - 2003
    Event2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States
    Duration: Oct 19 2003Oct 25 2003

    ASJC Scopus subject areas

    • Radiation
    • Nuclear and High Energy Physics
    • Radiology Nuclear Medicine and imaging


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