Check for Run 20863

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User name V. Sulkosky

Log entry time 23:21:01 on May 07, 2009

Entry number 271610

keyword=Check for Run 20863

I checked the first 50,000 events for run 20863. Here is what I found.

1) Number of L1A's that were T1's:           49992
2) Number of unprescaled T1's (scalers):     54526
3) Number of T1's from 1877:                 52956
4) Number of T1's first hit from 1877:       49992
5) Number of T1's multi-hits from 1877:       2965

Here is the good news, items 1 and 4 match each other! Second the number of events that had more than 1 hit was about 5.6%, which is consistent with the dead time of T1 from cosmics. Using the datamon deadtime of about 13-14%, our true deadtime is probably closer to 8%.

A copy of this log entry has been emailed to: yqiang,rom,jiang,jpchen,doug,zhaobo,tdaver@wm.edu