Run French FADC 18900 X - 18905 X - 18910 X - 18916 X - 18920 X - 18924 X - 18927 X - 18928 X - 18929 X - 18930 OK - 18931 OK - 18932 OK ? (FADC DAQ: Response seen but looks noisy and strange) 18933 X - 18934 OK - (Very short) 18935 OK OK 18936 OK - 18939 X - 18940 X OK 18941 X OK 18942 X OK 18943 X - 18944 X - 18945 X -
According to the Compton logbook, the runs in which the BCM looks OK in the French DAQ are precisely those which are "photons only" and not "photons and electrons" or "photons + electrons + coincidences".
So it may be something in the electron DAQ, or conceivably the electron decoding, is corrupting the BCM data.
BCM looks OK in most of the FADC runs that have been analyzed but strange in one; many runs have not been analyzed for FADC.
A copy of this log entry has been emailed to: paschke@jlab.org, souder@phy.syr.edu, camsonne@jlab.org