Radiation hardness of the Avalanche Photodiodes for ECAL CMS detector at CERN
The CMS ECAL Endcaps
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UK CMS Oversight Committee Mtg 23.5.2008 STFCR AL 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
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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. EE front end readout. - PowerPoint PPT Presentation
Transcript of 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
UK CMS Oversight Committee Mtg 23.5.2008
STFCRAL
D Cockerill
VPTs SC HV cardsUmbilical cablesEE Motherboards All delivered EE VFE cards EE FE cards Polyethylene moderator
EE front end readout
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
STFCRAL
D Cockerill
SC assembly
Plot:Crystal deliveryNaked SC assemblyHV tested SCs
- All SCs HV tested and ready or mounted on Dees
Nov OsC
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
STFCRAL
D Cockerill
Dee4
Dee4
As of Thursday, 9 left to mount
Expect mounting to be completed by Fri 23.5.08.
UK CMS Oversight Committee Mtg 23.5.2008
STFCRAL
D Cockerill
Dee3
Dee3
HV looming completed
Moderator mounted
Stability fibres and LV mounted
Trigger mapping into readout motherboardscompleted (this photo)
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
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
UK CMS Oversight Committee Mtg 23.5.2008
STFCRAL
D Cockerill
Other info
