User name V. Sulkosky
Log entry time 17:42:52 on September 10, 2008
Entry number 243058
Followups:
keyword=S2m ADC Signals from Paddle 4 Resolved(?)Figure 1 and 2 show the Left and Right ADC signal from S2m paddle 4 (red
curve) compared to the ADC signals from paddle 2 (black curve). The
signal seemed to indicate that there were no events in the ADC spectra
from this paddle. All other ADC signals for S2m are comparable to paddle
2.
I checked the logic modules that form the trigger for S2m and discovered
that the output cable that carries the logic AND between left and right
PMTs for paddle 4 had a loose connection going into the summing module.
Hence I did not see a logic pulse for paddle # 4. I double checked the
modules using a pulser and verified that I obtain signals for each
paddle. Then I verified I received a signal for each paddle from cosmic
events.
Once the DAQ is running again on adaql2, I will verify that I obtain
reasonable ADC spectra for paddle 4.
A copy of this log entry has been emailed to: bogdanw@jlab.org,ycwang@jlab.org,chiran@jlab.org
Figure 1
Figure 2
