• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT
    Make New Entry, Make Followup Entry

    User name X. Zheng

    Log entry time 20:45:03 on November10,2009

    Entry number 298829


    keyword=PVDIS DAQ - Extra delay in right arm T1 should be removed

    Using the long check-out run this evening (4915), there is significant loss in electron narrow trigger rate compared to electron wide, for more than half of the groups. The fbTDC spectrum shows a clear cutoff on the narrow trigger before of late electron VETOs. Upon this observation I was told an extra 16ns delay cable was added to Right arm T1 during the access today as part of pion VETO fix.

    The plot below is from group 7.

    We are calling a short controlled access to remove this cable.

    FIGURE 1