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User name M. Iodice
Log entry time 06:06:46 on November28,2008
Entry number 251139
Followups:
keyword=Rich problem during HV scanThe HV scan has been done for the rich:
HV=2250 Run 3989 pedestal - Run 3993 production
HV=2300 Run 3995 pedestal - Run 3996 production
HV=2150 Run 3997 pedestal - Run 3998 production
HV=2200 Run 3999 pedestal - Run 4000 production
The reply of the runs 3996 (2300V) and 3998(2150V) BOTH show an abnormal distribution of the number of photons (see figure). If this could be somehow justified for the run at 2300 V where possibly the noise starts to dominate, it is NOT understood for the run at low HV (2150 V). A possible error could be due to the loading of the pedestal files.
FIGURE 1
