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User name X. Zheng
Log entry time 18:27:22 on July13,2001
Entry number 65976
This entry is a followup to: 65906
keyword=right arm gas cerenkov PMT #2 & #4
The "ADC hit per PMT" is the total number of entries in raw ADC spectrum for each channel. If one channel has a higher pedestal then it will show much more "hits" than other PMTs. For PMT #2 and #4 pedestals are higher than others and they actually did not change since the last running period (x=0.6 runs, checked with run #20932). Because we have a much higher rate (pions, most of them go into "pedestals" in raw spectrum), so they look not normal. As far as the software calibration is good then this should not affect PID efficiency. Should modify the online det kumac to make sure the plots sensitive to real problems.
Calibration for left and right arm gas cherenkovs has been checked and there is almost no change in pedestals and gains. Will keep the original calibration.