5.3.2013 Meeting

SVT DAQ meeting agenda

Discussion points:

* Dev board: quick tests of new firmware, new dev board status
* Status on getting the Test Run DAQ up and running in group C
* Proposal
* JLab DAQ integration status
* Status of APV25 trigger buffering
* Any news on RCE and COB production for HPS
* Hybrid production plans/discussion (schedule )
* AOB

Minutes 5/3/2013

Jlab integration
Pelle is working slowly in trying to compile sergey's code on a linux machine at slac. 
When pelle is back we should try to setup the backup solution with a separate processor blade and work on that.

Board production status
Two boards are out for production, COB and RCE, and boards are expected to be produced by end of may. The firmware is progressing well. The RTM will go out for production slightly later, probably end of May. 

Hybrud and FE board schedule
Pelle showed the current schedule for hybrid and FE board which starts out this week. Initial reaction was that the schedule as it is now has good flexibility and Ryan didn't see any problem with any of the milestones. The FE board firmware work has also to a large extent been done already by Ben.

Hybrid production
The hybrid requirements was discussed and Tim showed some sketches on the mechanical design. There was a question on the mechanical stability on the silver epoxy joint planned to seat the CF frame onto the "lip" of the hybrid. Pelle and Tim glued two pieces of FR-4 with the epoxy for a quick mechanical stress test after the meeting. Tim mentioned the joint will have to take 5lbf (?).

Ryan said that the hybrid schematics is only ~1 day of work. Basically removing the unused components and adjust space for a connector. He would make an initial block-out of the board next week to get a better feeling for how it looks. In Tim's sketches the hybrid is aporox. 49.5x45mm. The current hybrid is 69mm long.

The main challenge with the connector is the HV specs. We could solder the connector on the board directly and/or have a separate HV connector on the board. Should be thought about some more. 

There was a discussion about what aspects of the features we've seen could have something to do with the hybrid or what we could improve. 
One of the outstandig issues was the problem operating cold. SLAC will try to get the cold setup from SC and re-run those tests w/ the experts close-by. Ryan's hypothesis is that it was a trigger alignment problem.

Pelle will ask around for day (or perhaps just use the next mtg) to have a dedicated meeting in understanding the edge channel noise problem. To test Ryan's hypothesis of a power distribution problem there will need to be some more work done, like operating it with a separate board for debugging.

Ryan will go ahead and blick out the new hybrid as if no special changes would be needed and if we learn anything new go back and mitigate that in the design.
GIMP old

GIMP new