Revision as of 11:29, 25 July 2014

July 24, 2014 FDC+CDC meeting

Agenda

FDC meeting ID: 290664653

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 # DAQ  (Beni)
 # CDC status (Mike, Beni)
-#* noise studies
+#* noise studies [http://www.jlab.org/Hall-D/Users/zihlmann/CDC/noise/test4 noise studies]
 # FDC status [http://www.jlab.org/Hall-D/detector/fdc/DAQ/First_Track_All_FDC.pdf First Track through all packages] (Lubomir)
 # Electronics (Chris, Nick)
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 == CDC update ==
-Mike made a report, linked above:
+- Beni studied the noise
-- first slide shows the positions of the channels with noise as analyzed from the fADC data.
-- next several slides demonstrate the "missing bit" problem. In one case all the channels in one module have that. Naomi: such problem was fixed by re-floating the circuit board.
-- last slide shows the mean and the RMS of the pedestals. Questions about the meaning of the overflow/underflow in these histograms: Mike will work on that.
-- Mike: the strain relief of the signal cables is not good enough: sometimes may lose contact. Fernando will find a way to improve it.
-- According to Mike the pedestal subtraction in the Dave's code is done correctly, so this is not an explanation for the low CDC efficiency as discussed yesterday in the calibration meeting.
 == FDC update ==