NDOS Commissioning Meeting 2011/10/06¶
Attendance: Jon, Mark Mathis, Luke, Mat, Leon, Dave Demuth, Susan, Nick, Zeb, Rafael, Jan, Enrique, Martin, Andre, Tyler, Mike, Kurt, Andrew, Peter
Agenda:
- Beam & Detector Update
- DAQ Status & Plans
- DCS Status & Plans
- AOB
Beam & Detector Update¶
- Beam:
- Detector:
- APDs moved last week:
- shuffled 15 APDs from block 0 to blocks 1 and 2
- 13/15 are operating well, basically all pixels are reading out that were before (~4 APDs have two or fewer pixels masked off)
- 1 APD was found to have trim pot pulled off; attempted repair shows HV looks right, but APD is noisy.
- 1 APD is exhibiting the usual surface contamination problem. Leon will take this back to CalTech
- APD work this week:
- Leon and Mat installed a silicone-coated APD with intentional leak (o-ring was left out). That APD was noisy last week, but after cable-ectomy it is behaving well (for the last few days)
- installed a parylene-coated APD with intentional leak (o-ring was left out). That is operating normally.
- Leon brought out vacuum-testing fixtures; we also received a shipment of sealed heatsinks, so these are being vacuum tested and so far 9 have been installed, 3 of which have parylene-coated APDs. Of these 9, one is showing noisy behavior.
- We will enable cooling on 7 of these APDs after this meeting, which will include the two leaky APDs, 3 units with new heatsinks but no coating, and 2 parylene-coated APDs with new heatsinks.
- if all goes well tonight, then we'll enable cooling on the remaining three APDs on the detector.
- DSO scans will be done once per shift through this weekend.
- Mat: will also be working with David Demuth tomorrow in order to test assembly tracking.
- APDs moved last week:
DCS Update¶
- Martin:
- Zukai's "event display" overview is now in use
- GUI distinguishes between good warm and good cold APDs (dark vs. light green)
- on-call experts (24/7) are now listed on the white-board as well as the DCS wiki.
DAQ Update¶
- Peter: working on updating (cleaning up) the base release of the DAQ software
- Jon: RC has been updated, and instructions for shifters has changed.
- Andrew: new production TDU out at MINOS building, and a new antennae has been installed that should improve stability, but it's not in use yet.