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User name ejensen
Log entry time 16:44:11 on July10,2010
Entry number 331348
keyword=Shift in coincidence peak
A shift in the t1 coincidence peak was observed in runs 1851 and 2026 (1st plot). There was initially a suspicion that this shift may be due to the higher beam current. It was soon realized that t6 was setup as a singe arm trigger for run 1851, which probably accounts for the shift. A low current run was taken anyway and the results are shown in he 2nd plot. There appears to be no shift in the peak due to lower rates.