Main INDEX,
Monthly INDEX,
PREV,
NEXT
Make New Entry,
Make Followup Entry
User name saw
Log entry time 23:03:36 on October 22, 2010
Entry number 202168
keyword=Beam: BCM calibration run
I forgot to tell MCC to start the BCM calibration with beam off for two
minutes, so the first 3uA is not bounded by beam off on both sides. So I
had MCC do an extra 3uA period at the end of the calibration run.
In the plot below the green is the Unser, with the scale on the right
hand axis. Since the Unser preamp gain has been divided by 10, the unser
shows a 1.2uA shift for 12 uA change in current. The tracking of ibcm1
and the unser on this plots shows that the nominal gain 5 calibration in
EPICS is reasonable.
BCM calibration scan
