D0 Run IIa Trigger Commissioning

The D0 trigger system selects "interesting" events produced by the Fermilab Tevatron Collider for further offline analysis. The Tevatron proton and antiproton beams collide at 7 Mhz. The trigger system selects 20-30 Hz of these events to be written to tape. D0 has three levels of trigger filtering:

Level 1 - A pipelined hardware trigger with inputs  from the liquid argon calorimeter, scintillation counters, the muon system, and the fiber tracker.

Level 2 - Combines and extends L1 information in specialized preprocessors.  It also adds information from the silicon tracker.

Level 3 - A Linux processor farm which can reconstruct and analyse events.

A useful general text description of the trigger was presented at the Xth Real Time Conference 97, Beaune France

News:

There will be a Run2a  Trigger Workshop at Fermilab on April 22-23.

Final Agenda and Links to talks

Video Archive

Links:

Old Run II trigger page

Level 1

  • Framework
  • CTT
  • L1 CTT trigger documentation
  • Muon

    • Level 2

    Level 3

    Trigger commissioning schedule

    Trigger Simulator

    Trigger Board

    Meetings:

    - Thursdays at 3:30 in the Ninth Circle

    Meeting transparencies:

        2/28/2002

    Introduction (Ron Lipton)
    Level 2 Status (Roger Moore)
    Level 1 Calorimeter (Dan Edmunds, Bob Kehoe)

        3/14/2002

    Introduction and schedule (Ron Lipton)
    CTT Status (G. Blazey)ppt version

        3/28/2002

    Level 3 Status and Recent Work - (Doug Chapin)
    L1 CAL Schedule and PROM Programming (Bob Kehoe)
    Plans for Trigger Workshop (Ron Lipton)

        4/11/2002

    CTT Hardware Protocols - Talk - Document - (Levan Babukhadia)
    Trigger Monitoring with the Luminosity System (Jaewon Park)
    Minutes (Ron Lipton)


    Organized by Ron Lipton (lipton@fnal.gov)