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 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


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’


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


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


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.


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


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


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%


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


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


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


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


616 Dee 1 ass + test

620 Dee 2

621 Crystals delivery Dee 2





629 Dee 3






638 Dee 4






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 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


Additional info follows, next slide


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

CMS-UK Oversight Committee 17/5/04 D.J.A. Cockerill - RAL 1 The CMS ECAL Endcaps Crystal ECAL Endcap...

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