the cms ecal endcaps

UK CMS Oversight Committee Mtg 23.5.2008

STFCRAL

D Cockerill

The CMS ECAL Endcaps

UK Responsibilities

• Procurement and testing of VPTs

• Design and procurement of the VPT HV system

• Design/procurement of the mechanical structures

• Electronics systems integration

• SC and Dee assembly

• Test beam appraisal and analysis


STFCRAL

D Cockerill

VPTs SC HV cardsUmbilical cablesEE Motherboards All delivered EE VFE cards EE FE cards Polyethylene moderator

EE front end readout


STFCRAL

D Cockerill

Naked SC assembly rates

Naked SC assembly rate, per week

‘Naked’ SC assembly

All 14648 VPTs and crystals glued

All SCs completed(Monday of this week!)

16/wk

Nov OsC


STFCRAL

D Cockerill

SC assembly

Plot:Crystal deliveryNaked SC assemblyHV tested SCs

- All SCs HV tested and ready or mounted on Dees

Nov OsC


STFCRAL

D Cockerill

Dee assembly – SC mounting

SC mounting

Dees 1-3 SC mounting completed

Dee4 completed by today, 23.5.081 Quad

1 Dee

Nov OsC

23 May 08


STFCRAL

D Cockerill

Power cooling

Power cooling

2 of the 8 versions of ‘super cooling units’ needed per Dee

Each is a fully welded and tested system

The last 2 (of 32) have been completed this week and are undergoing pressure/leak tests A fully welded column of 2

cooling blocks

Super unit to be welded together

Transferframe


STFCRAL

D Cockerill

Dee4

Dee4

As of Thursday, 9 left to mount

Expect mounting to be completed by Fri 23.5.08.


STFCRAL

D Cockerill

Dee3

Dee3

HV looming completed

Moderator mounted

Stability fibres and LV mounted

Trigger mapping into readout motherboardscompleted (this photo)


STFCRAL

D Cockerill

Dee2

Dee2 with its complete set of SCs Dee2All super cooling units mountedInstallation of VFE and FE cards underway

OPAL transfer frame to point

5


STFCRAL

D Cockerill

Dee1

Dee1Fibre optic readout support panels in place, ready for final fibre optic routing

Dee1All electronics in placeAll towers tested and working


STFCRAL

D Cockerill

EE Assembly and Integration Status

Dee Assembly and Integration Status, 22.5.2008

Dees 1–3 All 10986 channels checked and OK for signal continuity

Dee1 Single tower readout – pedestal width on all channels ~2ADC counts in line with expectations for electronics noise of 3500-4000 electrons per channel


STFCRAL

D Cockerill

EE Risks

Insufficient ECAL effort (ED/ID)Continually monitored

New cooling schemeAt end of production

Electronics integrationGood progress, teams in place

Cable crimpsAll replaced, checked at each levelof subsequent integration

Fibre optic routing – possible delays/misroutingDatabase ready. Routing on Dee1 commencing


STFCRAL

D Cockerill

EE Risks (cont’d)

Installation and commissioning at point 5

ECAL installation and commissioning led by K Bell (RAL)Brings full experience from the mounting of the36 supermodules for the barrel ECAL

Point 5 installation and commissioning team establishedTeam involves CERN CMS (point 5) and CERN ECAL engineers and techniciansand a dedicated ECAL DAQ team

Weekly meetingsDetailed installation sequence in place, from surface of point 5 to mounting on HE

Commissioning will be carried out in sectors with close feedback from the DAQ/DQM teams


STFCRAL

D Cockerill

Planning for EE

Dee1 and Dee2 at point 5, r.f.i. by 16 June 2008Dee3 and Dee4 at point 5, r.f.i. by 21 July 2008


STFCRAL

D Cockerill

Conclusions

SC assembly and mounting on Dees (nearly) completed

Good progress with the installation of electronics and services on Dees 1-3

Dee1 and Dee2 to point 5 by 16 June

Dee3 and Dee4 to point 5 by 21 July


STFCRAL

D Cockerill

Other info

the cms ecal endcaps

Documents