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    User name A. Camsonne

    Log entry time 07:27:12 on November 15, 2007

    Entry number 214590

    This entry is a followup to: 214540

    keyword=Dead time check

    I ran THaNormana on run 2437, the dead time computation seems to be right
    ( I think the calculation was not changed but since we are in single arm
    there is no T5 so all corrections are 0 )

    The summary gives :
    Normal end of file /adaql2/data4/e05110_2437.dat.0 encountered
    Trigger Prescale Num evt Num in Livetime
    --- Factor CODA file Scalers
    1 1.67772e+07 0 1417920 0
    2 1.67772e+07 0 0 0
    3 2 690111 1442924 0.956545
    4 6 10852 87778 0.74178
    5 65535 0 0 0
    6 65535 0 0 0
    7 9999 0 0 0
    8 65535 8 646277 0.811231
    9 1 0 0 0
    10 1 0 0 0
    11 1 0 0 0
    12 1 0 0 0

    Number of events = 700933
    Run-averaged livetime from scalers = 0.952223
    Correction for non-synch of scalers = 1

    so for the main trigger it is close from the end of run value and display.
    As usual data taking rate improves when prescales are used.
    We might want to take a few high rate runs with different prescales later
    but the dead time seems reasonable.