Revision as of 17:40, 4 September 2014

September 4, 2014 FDC+CDC meeting

Agenda

1. Info needed on commissioning.
2. DAQ
3. CDC update
4. FDC status (Vlad, Lubomir)
5. Electronics (Fernando)
   • CDC noise tests
6. Engineering
   • cathode scan [1], [2], [3]
7. Commissioning Wiki Page (all)
8. Other

Instructions for Bluejeans meeting connection

FDC meeting ID: 290664653

Minutes

Participants: Curtis, Naomi (CMU), Eugene, Mike, Bill, Chris, Nick, Simon, Fernando, Vlad, and Lubomir (JLab).

Commissioning

- Curtis pointed out to the information needed to be fill in the commissioning plan for the CDC and FDC in the "Tune photon beam" sections. The info for the FDC has already been linked there: it provides detailed instructions for the shifters how to turn ON/OFF the detector including special instructions for doing this after a new beam alignment.

DAQ

- Lubomir: There were some problems with the DAQ recently, in some cases there was no connection to the ROCs, in other the TDC crates only (!?) were not giving any data. Beni couldn't start it on Wednesday, Sergey also tried. Surprisingly today, without any change, we were able to start the DAQ again.

CDC update

- CDC collected a lot of data last weekend (there were problems with the FDC crates). Mike is analyzing the data and reports several cards not showing data. On one card, the nominal HV value can't be set.

Electronics

- Fernando with Nick did extensive studies of the noise from the CAEN HV supplies as induced on the CDC channels (see the document linked above). Tests were done on several cards around a noise one C6 in different configurations.