1. GEM Upgrade Projects: Schedule
Alexei Safonov
(Texas A&M University)
GEM Upgrade Projects: Schedule

2. US Responsibilities USCMS Phase-2 Upgrade (NSF Scope):
GE2/1 and ME0:
Optohybrid on-chamber board, links, backend (xTCA-based)
Non-negligible schedule inter-connections
Connected with production schedule
Two projects
But GE2/1 & ME0 schedules shifted relative to each other

3. Global Schedule GE1/1 GE2/1 ME0
Focus on resource & facility use leveling
Schedule avoids overlapping similar stages of development for different projects while respecting external constraints
Floats of 6+ months between foil production stages
Floats of 6+ months between Detector Module Assembly stages
Floats of 6+ months between Installable Unit (super-chambers/chambers/stacks) assembly stages
GE1/1
GE2/1
ME0

4. Organization and Planning
USCMS manager: David Saltzberg
Systems Engineering:
Responsible for keeping an eye on interfaces, dependences and part of reviews
System engineering has been added specifically at the NSF request
Tom Gorski – GEM Systems engineer
Mike Matveev – CSC Systems engineer

5. Important Dates TDR: June 2017 (internal CMS version)
CMS cost model mostly consistent with the NSF-based US CMS planning
There are some select issues, specifically ME0 cost can increase significantly if we do not switch to lpGBT
Reviews (not including internal USCMS ones):
April 2017 – NSF pre-PDR
Early 2018 – PDR (TDR will be already available)
Funding:
R&D funding is via NSF (small budgets in FY16 and 17, increase in 18 and 19)
Project funding starts in FY20
Constraint for construction project and schedules

6. GE2/1 Detector Currently assumed layout: 48 VFATs per chamber
Total 12 CTP7
Currently assumed layout:
48 VFATs per chamber
6 bi-directional links (GBT)
8 uni-directional links (trigger)
12 CTP7s (+1 spare)
CTP7
OH 2
CSC OTMB
OH 1
Trigger links
GBT links
Evaldas Juska (TAMU)
20 degree chamber
Total: 72 chambers

7. ME0: High Granularity Version
20 degree chamber (48 VFATs)
Total: 216 chambers
Two problems:
TP cost has been underestimated
TP costed a 24 VFAT version, which is lower granularity than what simulation considers the default now
Proposal: switch to low power GBT
Allows a large reduction in the number of links and less CTP7s
Reduces cost overrun: in apple-to-apple comparison, regular GBT version costs ~1M CHF more
High granularity version (48 VFATs):
Total 18 CTP7s (+2 spares)
Total link count per chamber
2 bi-directional link (LpGBT)
4 uni-directional links (trigger)
Requires 2 OHs per chamber and doubles the number of LV channels
OH 1
OH 2
CTP7
Total 18 CTP7s
Trigger links
LpGBT links
Evaldas Juska (TAMU)

8. GE2/1 Electronics Schedule
xxx

9. ME0 Electronics Schedule
xxx