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CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 1 The CMS ECAL Endcaps Crystal ECAL Endcap...
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Transcript of CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 1 The CMS ECAL Endcaps Crystal ECAL Endcap...
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 1
The CMS ECAL Endcaps
Crystal ECAL Endcap Calorimeter
(EE)
PreshowerEE
14648 EE crystals
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 2
CMS ECAL Endcap, EE
The UK is responsible for
- procurement of the mechanical structures for the detector
- completing the detailed design and systems integration
- procurement and testing of VPTs
- design and procurement of the VPT HV system
- assembly of 50% of the SCs
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 3
Potential mass production suppliers:Shanghai Institute of Ceramics (SIC)North Crystals (NC), Apatity, Murmansk
Pre-production full sized ECAL Endcap samples
SIC: 50 received Feb 2004 150 + 50 EB on order NC: 7 received May 2004 3 more due soon
ECAL Crystals
Urgent need to secure additional crystal producers to meet the CMS schedule for ECAL Barrel and Endcap installation.
Must ensure crystals meet CMS ECAL technical specifications, especially for radiation tolerance, before launching contracts
UK leading the crystal appraisal work at the CERN H4 ECAL test beamProgramme of intense test beam irradiation and monitoring with purpose built supercrystals mounted on E0’
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 4
SIC Co60 irradiation results
Induced absorption data for the SIC crystals- consistent with results from BCTP crystals
Specification limit
1.5 m-1
400Gy in 1.1h
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 5
Crystal test beam appraisal with E0’
Supercrystal in assembly jig with 15 SIC Endcap crystals for
test beam appraisal
10 remaining pockets for BCTP crystals as control/comparison
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 6
Vacuum Photo-triodes (VPTs)
25.4 mm
VPT Production – good progress 7900 (51%) delivered
Concerns:- anomalous devices, 6% of production
Observations:- production about 4 months behind contracted delivery agreement. Not on critical path.
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 7
EE large mechanics
Excellent progress. Large mechanicsfor first Endcap finished at TM,on schedule.
• BP flat to 0.4mm across 3.4m• BP precision holes to within 50m to neighbour
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 8
EE large mechanics
Ring flanges
2 cast, machined and completed
Load tested to 12.75t (versus 8t in CMS)
Deflection: 0.4mm at 12.75t in agreement with FEA
Holes to within 250-500 m, within request
Cooling and positional spacers
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 9
Front-End Electronics
Engineering run for DSM ASICS successful (enough for 3 SMs)
Launch full production of electronics in mid-summer.
Plan is to have a full SuperModule in beam by the end of September 2004.
Conversion to 0.25 m electronics has been very successful!
25 channels ECAL Trigger TowerTest Beam October 2003
E/E
1%
0.5%
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 10
EE electronics integration
Remaining major UK design/procurement task
Detailed design for theintegration of electronics
and serviceson the back of EE
Progress:Mass production of 500
cooling bar castings commencing Mon May 17
Completion of castingsEnd June 2004
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 11
Surface
SX5 installation of EB+ (and as many EB- as possible)
Dec 2005 until January 15th 2006
Underground
UX5 installation 1 (before Tracker) May 2006
UX5 installation 2 (after Tracker) November 2006
CMS closed April –June 2007
Pilot run End late Summer 2007
ECAL Endcap
EE/SE+ installation October 15th –November 15th 2007
EE/SE- Installation March 2008
Physics run
CMS planning, main dates of CMS V34
P Bloch 27.4.04
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 12
Crystal Planning
P Bloch 27.4.04
Possible delivery profiles with 2 crystal suppliers, P Bloch 27.4.04
• Barrel crystal schedule →
• End Cap crystal schedule →
BCTP 2nd Supplier totalbefore 24600 24600Q1 2004 300 24900Q2 2004 3000 27900Q3 2004 3000 180 31080Q4 2004 3600 360 35040Q1 2005 3600 610 39250Q2 2005 3600 860 43710Q3 2005 3600 1100 48410Q4 2005 3600 1200 53210Q1 2006 3600 1260 58070Q2 2006 3070 1260 62400
BCTP 2nd supplier totalbefore 100 150 250Q3 2006 2050 600 2900Q4 2006 2900 1100 6900Q1 2007 2900 1100 10900Q2 2007 2900 1200 15000
Total 10850 4150 15000
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 13
EE planning P Bloch 27.4.04
ID Task Name
611 Dee 1
612 Crystals delivery Dee1
613 Crystals delivery Dee1
614 Assembly supercrystals for Dee 1
615 Assembly supercrystals for Dee 1
616 Dee 1 ass + test
620 Dee 2
621 Crystals delivery Dee 2
622 Crystals delivery Dee 2
623 Assembly supercrystals for Dee 2
624 Assembly supercrystals for Dee 2
625 Dee 2 ass + test
629 Dee 3
630 Crystals delivery Dee 3
631 Crystals delivery Dee 3
632 Assembly supercrystals for Dee 3
633 Assembly supercrystals for Dee 3
634 Dee 3 ass + test
638 Dee 4
639 Crystals delivery Dee 4
640 Crystals delivery Dee 4
641 Assembly supercrystals for Dee 4
642 Assembly supercrystals for Dee 4
643 Dee 4 ass + test
H1 H2 H1 H2 H1 H2 H1 H2 H1 H2 H1 H2 H1 H22003 2004 2005 2006 2007 2008 2009
Need highly parallel production, good planning and preparation for 2006/7
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 14
CMS EE Conclusions
Late EE crystal delivery THE major concern
- SC mass production on hold
UK successfully undertaking its deliverables to CMS
- VPT procurement, test and appraisal
- large mechanics design and procurement
- HV system design
- Electronics integration
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 15
Additional info follows, next slide
CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 16
Impact on UK programme, late crystal delivery
Good planning, preparation and parallel production will be needed for the assembly of 4 Dees in 2006/7
Use all the resources that will become available :
UK SC assembly laboratory
CERN ECAL barrel assembly team and infrastructure
Possible technicians at CERN from Rome
The separate CERN TA1 group and CERN SC/Dee assembly laboratory
Gain assembly experience beforehand
• SC construction - will have ~ 250 EE crystals from this summer = 10 SCs
- ‘SC challenge’ to show we can assemble 10 SCs per week
• Test beam experience – integration of electronics, laser monitoring system
• Dee pre-assembly experience of mechanical and cooling items, with CERN TA1 group
• Dee electrical looming prepared ahead of time