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User name A. Camsonne
Log entry time 01:45:30 on March30,2014
Entry number 388090
keyword=EPICS BCM DVM readout wrong
I tried to have a rough calibration for the Hall A BCM, but it seems they read only pedestal, we tried 1 and 2 uA and the value did not change, either we have the wrong EPICS value or we are reading the wrong channel. Will have to check it with John Musson. The scalers seemed to correlate well with current, so using injector current we should be able to have a rough calibration.
We can see I forced the current to be 2 uA by changing calibration and we reduce the current to 1 uA and the hall A current did not change, so the value seems to be pedestal only.
FIGURE 1
FIGURE 2