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Pixel Update

Pixel Update. October 3, 2005. Outline. Barrel status and repair strategy Revised ATLAS installation schedule Finishing pixel work at LBNL Disk/endcap schedule Service panels and related Work at CERN. Barrel Staves. Stave loading started about 1 year ago.

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Pixel Update

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  1. Pixel Update October 3, 2005

  2. Outline • Barrel status and repair strategy • Revised ATLAS installation schedule • Finishing pixel work at LBNL • Disk/endcap schedule • Service panels and related • Work at CERN

  3. Barrel Staves • Stave loading started about 1 year ago. • 44/112 (39%) staves have been loaded (one partially) till now; • First problem (April): MCC wire-bonds break. Reason seems contamination of MCC surface by SE4445 used to glue MCC to FlexHybrid (Maurice figured this out). All MCC encapsulated must be rebonded.. Bonn is the only site who developed the technique. • 28 (7 Wu, 8 CPPM, 13 Genova) staves in total have MCC encapsulation. • 3 done. Note this affects disks also, repairs in progress at LBL • Second problem (May): Omega delamination from TMT. Loading stopped for one month. • 2 staves have been found to be delaminated; • Peek collar designed and successfullyapplied to several bare and loaded staves. • Strength to delamination increaseof ~6x for pull/torque. • Third problem (August Crisis): Al pipe corrosion… production halted

  4. MCC problem

  5. Inspection Clean: 32 staves Salted: 28 staves Nickel peals off: 18 staves

  6. Corrosion • Galvanic corrosion from nickel-aluminum interface, nickel necessary to braze on fittings • Thermal tests done using water-antifreeze mixture and insufficient drying in many cases • In addition to visual signs of corrosion, leaks develop. • About ½ of staves looked at and 15% leak, in some cases with a dozen or more holes caused by corrosion. • Develops over time => replace all stave pipes • Note that no corrosion has been seen in production disk sectors made at LBL – different process, no water

  7. More corrosion

  8. Repair Strategy • 43 loaded staves. Insert another pipe inside the existing pipe and inject “glue” with good thermal properties but there will be an increase in the module temperature. Glue on fittings. Pipes of appropriate diameters ordered, some preliminary tests but not proven yet. • Staves without modules. Dismantle staves. It turns out that the gluing was not great so using tooling + local heat can take apart stave, replace pipe and put back together. Demonstrated on one stave, tooling, procedures in progress. • Make new staves, particularly for the innermost layer. New materials ordered or about to be • In addition, change to fitting scheme developed at LBNL for everything – no nickel or dissimilar metals.

  9. Who is Doing What • Insert pipe in loaded staves. Marseille and CERN but exact responsibilities TBD • Qualify process using dummy staves with heaters. What is increased temperature and pressure drop • Develop procedures • Dismantle and reassemble. Genoa. Likely to yield fixed staves first. • Build new staves • Material procurement: LBL and Germany • Machining of thermal management tiles: LBL and Wuppertal • Assembly: company(IVW) in Germany and Wuppertal

  10. Resuming Module Loading • The critical path is to produce and qualify new aluminum tubes. Marseille with some help from LBL • Maybe can resume loading of modules in December but guess that more likely January before really ramped up • Must increase by 1.5-2 rate of stave loading and testing, which is done at Marseille, Wuppertal and Genoa. • Plans how to do this but will be a challenge • Goal is to reach loading of 4 staves per week and testing of 5 per week.

  11. Schedule version 7.09 • Reasons for change? • Delays accumulated with ID services (especially pipes on barrel calorimeter) • Barrel calorimeter moves to z=0 on 26 October. Installation of ID services (type II/III) follows – critical path for all ATLAS. • Field map of solenoid needs both EC calorimeters • Install pixel system as late as possible. • Off-detector systems need to be in place for barrel then end cap commissioning • ID barrel and EC integration should keep working to previous RFI dates

  12. Critical ID dates

  13. B-calo C today

  14. B-calo 26 October 05

  15. TGC1 C-calo B-calo TAS-C B-map 26 April 06

  16. TGC1 C-calo B-calo TAS-C B-ID 11 May 06

  17. TGC1 MDT TGC2 C-calo B-calo TAS-C B-ID 30 June 06

  18. TGC1 MDT TGC2 C-calo B-calo TAS-C B-ID 3 July 05

  19. TGC1 TGC2 MDT C-calo B-calo TAS-C C-ID B-ID 5 July 06

  20. TGC1 TGC2 MDT C-calo B-calo TAS-C C-ID B-ID 6 July 06

  21. TGC1 TGC2 MDT C-calo B-calo TAS-C C-ID B-ID 10 July 06

  22. TGC1 TGC3 MDT TGC2 ECT-C JD C-calo B-calo SWC TAS-C C-ID B-ID 19 December 06

  23. TGC3 TGC1 MDT TGC2 ECT-C JD C-calo B-calo SWC TAS-C C-ID B-ID

  24. TGC3 TGC1 MDT TGC2 ECT-C JD C-calo B-calo SWC TAS-C C-ID B-ID

  25. EO-C TGC1 TGC3 MDT TGC2 ECT-C JD C-calo B-calo SWC TAS-C JF-C C-ID B-ID 30 May 07

  26. Installation ‘animation’ – Side A • Partial subset with ID highlights…

  27. B-calo A 26 October 05

  28. A-calo B-calo Mu-B B-map 25 April 06

  29. A-calo B-calo B-ID 11 May 06

  30. A-calo B-calo B-ID 12 May 06

  31. A-calo B-calo B-ID 15 May 06

  32. ECT-A A-calo B-calo B-ID 23 May 06

  33. ECT-A A-calo B-calo TAS-A B-ID 2 August 06

  34. ECT-A A-calo B-calo TAS-A A-ID B-ID 4 August 06

  35. ECT-A A-calo B-calo TAS-A A-ID B-ID 5 August 06

  36. ECT-A A-calo B-calo TAS-A A-ID B-ID

  37. ECT-A A-calo B-calo TAS-A A-ID B-ID

  38. ECT-A A-calo B-calo TAS-A A-ID B-ID

  39. TGC1 ECT-A A-calo B-calo TAS-A A-ID B-ID 14 September 06

  40. TGC1 ECT-A A-calo B-calo TAS-A A-ID B-ID 23 October 06 Side A “closed”. Hope to have access to end of ID EC-A.

  41. TGC1 ECT-A A-calo B-calo TAS-A A-ID B-ID

  42. TGC1 TGC3 MDT TGC2 ECT-A A-calo B-calo TAS-A A-ID B-ID Lots of steps for big wheels to get to here…

  43. TGC1 TGC3 MDT TGC2 ECT-A A-calo B-calo TAS-A A-ID B-ID Reopen to get pixels in…

  44. TGC1 TGC3 MDT TGC2 ECT-A A-calo B-calo TAS-A A-ID B-ID

  45. TGC1 TGC3 MDT TGC2 ECT-A A-calo B-calo TAS-A pixel A-ID B-ID 13 February 07

  46. TGC1 TGC3 MDT TGC2 ECT-A A-calo B-calo TAS-A pixel A-ID B-ID

  47. TGC1 TGC3 MDT TGC2 ECT-A A-calo B-calo TAS-A pixel A-ID B-ID

  48. TGC1 TGC3 MDT TGC2 ECT-A JD SWA A-calo B-calo TAS-A pixel A-ID B-ID

  49. TGC1 TGC3 MDT TGC2 ECT-A JD SWA A-calo B-calo TAS-A pixel A-ID B-ID

  50. TGC1 TGC3 EO-A MDT TGC2 ECT-A JD SWA A-calo B-calo TAS-A JF-A pixel A-ID B-ID Used to be April 2007 20 June 07

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