VEGAS Team Meeting

Attendees:

Adam, Sam, Marty, John, Richard, Randy, Joe, Paul, Jason, Mark, Anish

Agenda:

1. Status of internal RFI and OGP solution (Berkeley group issue)
2. Mode 10-19 hardware fix
3. Baseline ringing (high frequency noise) in VEGAS data
4. Top Hat
5. Status of MRs
6. Test Time
7. Other

Meeting notes:

1. Status of internal RFI and OGP solution (Berkeley group issue)
   • No update since last Monday
   • Get update report from UCB every Friday
   • Discussion of separating Offset and Gain from Phase calibrations
     • This could be accomplished
     • Assume(!) this solution is what UCB is already pursuing
2. Mode 10-19 hardware fix
   • corrected packet ordering problem
   • SRBS data also has what look suspiciously like OGP-derived artifacts *created a simulation of 150 version for additional evaluation
     • Perform time-domain tests
   • Still no mode 13 fix
3. Baseline ringing (high frequency noise) in VEGAS data
   • David Frayer has a nice new writeup on the wiki showing positive results about stability
   • All signs point to ringing caused by a standing wave in the cabling between Converter Rack and VEGAS
   • Mitigation ideas:
     • insulated cables, more thermally stable cables (semi-rigid instead of semi-flex?)
     • Partial alleviation through pads at connectors
   • Additional testing of pads and replacement cables over next couple weeks
4. Top Hat
   • No re-occurance in last week
   • Seen once in SRBS
   • Current solution is acceptable (Manager aborts w/message) is acceptable and issue closed
5. Status of MRs
   • HWEXPO rounding MR
     • MR is needed to capture preferred solution - based on latest emails from list
   • VEGAS Balancing
     • Melinda tests starting this week
6. Test Time
   • Tuesday
     • 8a OGP statistics [Marganian and Ray]
   • Wednesday (Test w/motion 1200 - 1300)
     • 9a - 2p Tests of pads on baseline ringing [Kobelski and Ford] * Test any new BOFs
7. Other
   • Partial success in new GB build environment (L8 only)