CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 1 The CMS ECAL Endcaps Crystal ECAL Endcap Calorimeter (EE) Preshower EE 14648 EE crystals.

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Presentation transcript:

CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 1 The CMS ECAL Endcaps Crystal ECAL Endcap Calorimeter (EE) Preshower EE 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 EB on order NC: 7 received May 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 beam Programme 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 Co 60 irradiation results Induced absorption data for the SIC crystals - consistent with results from BCTP crystals Specification limit 1.5 m Gy 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 mechanics for first Endcap finished at TM, on schedule. BP flat to 0.4mm across 3.4m BP precision holes to within 50  m 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  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 Conversion to 0.25  m electronics has been very successful! 25 channels ECAL Trigger Tower Test 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 the integration of electronics and services on the back of EE Progress: Mass production of 500 cooling bar castings commencing Mon May 17 Completion of castings End 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 15 th 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 15 th –November 15 th 2007 EE/SE- Installation March 2008 Physics run CMS planning, main dates of CMS V34 P Bloch

CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 12 Crystal Planning P Bloch Possible delivery profiles with 2 crystal suppliers, P Bloch Barrel crystal schedule → End Cap crystal schedule → Total

CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 13 EE planning P Bloch 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