U.S. ATLAS HL-LHC Upgrade LAr Level 2 and Level 3 Managers Mailing List

[John Parsons <parsons AT nevis.columbia.edu>]

Some guidance as to the breakout topics.


-------- Forwarded Message --------
Subject: 	NSF ATLAS LAr questions of interest for the breakout sessions 
today.
Date:   Wed, 19 Apr 2023 12:33:07 +0000
From:   Robert S Tschirhart <tsch AT fnal.gov>
To:     John Parsons <parsons AT nevis.columbia.edu>
CC: 	Michael Tuts <tuts AT pmtuts.net>, Hasan Jawahery (jawahery AT umd.edu) 
<jawahery AT umd.edu>, poc (poc AT bnl.gov) <poc AT bnl.gov>



John,

     Regarding breakouts today,  our questions today will include:

Coupling of NSF scope to DOE deliverables (Preamp/Shaper), integration 
at BNL.

Impact of the War in Ukraine on LAr electronics.

Walking through the choreography of deliverables with respect to a 
need-by date range.

Discussion of how crate system density risks (thermal, power) were 
realized and how the re-design of density progressed.

DC-DC converter:  COTS solution possible?  Radiation tests?  Thermal 
efficiencies and engineering? What is CMS doing?  How to address 
lifetime issues…socketable components?   Is there an associated risk in 
the risk registry?

Burn-in strategy of PCBs.    What was done in Phase-I?  ATLAS standards?

VTRX+ thermal issues associated with lifetime resolved?

Probably will request a drill-down into the FEB 20-board protype 
fabrication and testing.

Cheers,

Bob Tschirhart & Paul O’Connor