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    User name A. Camsonne

    Log entry time 07:27:02 on November 15, 2007

    Entry number 214589

    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.