SEQUENCE OF WORK ON SCT BARRELS ep27/11/98

DRAFT

 
  1. Cylinder + flange manufacture.
  2. QA tests + metrology
  3. Dry the cylinder (avoid vacuum) (this define T0 with cylinder completely dry)
  4. Thermal cycling to stabilise structure.
  5. CTE tests? (do we really need them on cylinder / or flat samples?)
  6. Mount tooling rings (TR) and tooling flanges (TF) to cylinder (concentric with mean dia obtained from metrology) (see 252325P4H)
  7. Bond inserts with adequate tooling, use the TR & TF as reference
  8. Machine inserts surface and precise holes, using TR & TF as reference.
  9. Metrology (TR & TF as ref?)
  10. Transport in container to trial assy lab (support from TF, spindle)
  11. Provisional acceptance.
  12. Perform trial assembly with other cylinders. This operation would require the TF to be dismounted except for cylinder 3. The trial assembly is also important to validate the assembly method and tooling.
  13. Disassemble the 4 cylinders, remount TF on each.
  14. Transport in container to module assy lab.
  15. Install cylinder in assembly station, (supported by spindle).
  16. Mount brackets.
  17. Evtl. Metrology?
  18. Mount cooling pipes, manifolds and test for leaks
  19. Install services support extensions (SSE)
  20. Mount cable harnesses
  21. Mount DCS components
  22. Mount tested modules and check connections.
  23. Test complete barrel (incl thermal cycling)
  24. Barrel ready
  25. Install complete SCT barrel in container (support with spindle?)
  26. Transport complete barrel to CERN
  27. Remove barrel from container and install on temporary support with adequate handling points, remove spindle (cyl. Protection!) (see 252346P4H)
  28. Reception test on Barrel
  29. Prepare Barrel for assembly
  30. Prepare cradle (equipped with similar rails as the ones fixed in TRT inner shell) and assembly wagon. (see 252356P4H)
  31. Mount thermal enclosure in cradle, directly supported from rail. Leak test
  32. Introduce the assembly wagon into Barrel 6 (see 252347P4H)
  33. Transfer B6 from temporary support to assembly wagon (see 252348P4H)
  34. Introduce B6 into thermal enclosure, using the assembly wagon, adjust position. (see 252349P4H)
  35. Mount B6 bearings, transfer barrel weight to rails
  36. Remove assembly wagon and TF of barrel 6
  37. Evtl. Seal B6 bearings where they pass through the thermal enclosure
  38. Repeat operations 27,28, 29 and 32 for barrel 5. (see 252350P4H)
  39. Introduce barrel 5 into barrel 6, using assembly wagon, adjust position (see 252351P4H)
  40. Mount interlinks, transfer barrel 5 weight to the interlinks. (see finbarrel2.jpg)
  41. Remove assembly wagon and TF of barrel 5.
  42. Repeat operations 27,28, 29 and 32 for barrel 4. (see 252352P4H)
  43. Introduce barrel 4 into barrel 5, using assembly wagon, adjust position (see 252353P4H)
  44. Mount interlinks, transfer barrel 4 weight to interlinks. (see finbarrel4.jpg)
  45. Remove assembly wagon and TF of barrel 4.
  46. Repeat operations 27,28, 29 and 32 for barrel 3. (see 252354P4H)
  47. Introduce barrel 3 into barrel 4, using the assembly wagon, adjust position
  48. Mount interlinks, transfer barrel 3 weight to interlinks.
  49. Remove assembly wagon and TF of barrel 3. (see 252357P4H)
  50. Replace temporary interlinks with final ones (if necessary). (see finbarrel6.jpg)

    51.  

    At this stage, the 4 barrels are linked together in the right relative position. Their services are still supported on the extensions attached to the rings fixed at each cylinder end.

     

  51. Mount thermal enclosure bulkhead (TEB) (TEB has to be compatible with barrel 6 SSE)
  52. Mount sealing between thermal enclosure and interlinks.
  53. Prepare the temporary radial cable support (TRCS)
  54. Transfer cables from barrel 6 to TRCS, arrange correct position in TEB.
  55. Remove SSE and TR from barrel 6
  56. Transfer cables from barrel 5 to TRCS, arrange correct position in TEB.
  57. Remove SSE and TR from barrel 5
  58. Transfer cables from barrel 4 to TRCS, arrange correct position in TEB.
  59. Remove SSE and TR from barrel 4
  60. Transfer cables from barrel 3 to TRCS, arrange correct position in TEB.
  61. Remove SSE and TR from barrel 3
  62. Apply sealant between cables and TEB.
  63. Install the 32 I & O pipes from barrel end to TEB
  64. Leak test all cooling circuits up to TEB.
  65. Mount thermal enclosure lid (TEL)
  66. Evtl. SCT Barrel ready for X ray survey (cfrp tube guiding the Xray head to be inserted inside the barrel 3 and adequately supported, from the cradle?)
  67. Mount the Services Support Wagons (SSW) on cradle rails
  68. Transfer services from TRCS to SSW and x-check outside diameter
  69. Dismount TRCS
  70. Final check before insertion inside the TRT
  71. Move SCT barrel in cradle in front of TRT
  72. Insert SCT barrel into TRT. (short rail extension are needed on the opposite end, to support the SSW)
  73. Unfold services from SSW to "final position"
  74. Remove the SSW
  75. Evtl SCT Barrel ready for X ray survey (cfrp tube guiding the Xray head to be inserted inside the barrel 3 and adequately supported, from the cradle?)
  76. Remove the TEL
  77. Prepare rails and tooling for the Pixel introduction
  78. Introduce Pixel detector
  79. Unfold pixel cable and route them on barrel end face seal at TEB
  80. Remove the temporary rails
  81. Mount the cooling pipes from Pixel to TEB
  82. Close the TEL
  83. Final test of ID Barrel prior installation in the pit

 

 

 

List of abbreviations:

 

B4 Barrel 4

TF Tooling Flange

TR Tooling Ring

SSE Services Support Extension

SSW Services Support Wagon

TEB Thermal Enclosure Bulkhead

TEL Thermal Enclosure Lid

TRCS Temporary Radial Cable Support