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The Standard RPC for low  regions

This document provides detailed assembly procedures, prototyping information, production plans, and available resources for the Forward RPC (Resistive Plate Chamber) in low-η regions. It also includes cost estimates and budget allocation information.

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The Standard RPC for low  regions

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  1. The Standard RPC for low  regions Tariq J. Solaija National Centre for Physics Islamabad, Pakistan

  2. RE */2,*/3 layout & dimensions • Required materials & cost estimates • Assembly procedures • Prototyping • Production plans • Available resources • Manpower • Equipment • Budget allocation • Quality Assurance • FEB production & testing • Summary Forward RPC EDR, Tariq Solaija

  3. CMS  SEGMENTATION Forward RPC EDR, Tariq Solaija

  4. Station 2 YE/-1 Forward RPC EDR, Tariq Solaija

  5. 20  sector of station 2, 3 & 4 Forward RPC EDR, Tariq Solaija

  6. RE */2 dimensions Forward RPC EDR, Tariq Solaija

  7. RE */3 dimensions Forward RPC EDR, Tariq Solaija

  8. Panel & frame Forward RPC EDR, Tariq Solaija

  9. RE 2/2 frame Forward RPC EDR, Tariq Solaija

  10. RE 2/2 parts Forward RPC EDR, Tariq Solaija

  11. Frame profile Forward RPC EDR, Tariq Solaija

  12. Assembled Sandwich Forward RPC EDR, Tariq Solaija

  13. RE 2/2 complete assembly Forward RPC EDR, Tariq Solaija

  14. Main RPC materials for RE */2, */3 1 ) Pet insulation sheet 250 micron 05 2 ) Copper sheets 250 micron 02 3 ) Fr4 sheet for strips 200 micron 01 4) Bakelite gaps 03 5) Al foil 500 micron 01 6) Al frame ( series 5000 ) 01 7) Signal cables 50 meter roll 8) Front end boards 03 9) Gas connectors (6 mm internal dia.) 04 10) Polyurethane filled panel with Al skin 01 11) H.V connector 01 12) Double sided sticking tape 15 meter 13) Al bars, screws, internal gas pipes, H.V and ground cables etc. Forward RPC EDR, Tariq Solaija

  15. Cost estimates for materials Forward RPC EDR, Tariq Solaija

  16. Chamber assembly Procedure 1. Put the gaps with already made H.V and ground connections on the assembly table. 2. Put the aluminum frame on the assembly table. The frame encircles a slightly raised trapezoidal platform. 3. Mount external H.V and gas connections on the frame. 4. Place the 7 mm thick polyurethane filled panel on the assembly table on the raised platform. The top as well as bottom sides of the panel are already glued to 500 micron thin Aluminum foil. 5. Paste 250 micron mylar sheet on the panel. Forward RPC EDR, Tariq Solaija

  17. Assembly Procedure - II 6. Paste the large gap on the mylar sheet using double stick tape. H.V connection is kept on the bottom side.7. Place the etched strip sheet on the gap.8. Put mylar sheets cut to the size of two top gaps on the strips.9. Place the two gas gaps at appropriate position keeping the ground connections at bottom and H.V connection at top.10. Paste mylar sheet on the top gaps.11. Put copper foil on the mylar sheet. This copper foil acts as signal ground and is offset inward by 15 mm.12. Make coaxial cable connections to the signal strips and ground, 13. Place 500 micron Aluminum foil on the top.14. Place Aluminum bars on aluminum foil. Forward RPC EDR, Tariq Solaija

  18. Assembly Procedure - III 15. Raise the Aluminum frame to accommodate the assembled sandwich.16. Put the assembled sandwich on a plane table.17. Make internal gas connections.18. Complete the external H.V and ground connections.19. Place the frame lid at the top and screw it to the bottom frame.20. Mount FEB shielding covers on top panels and attach cooling pipe with it.21. Mount FEB on the chamber and connect cables to the FEBs. Forward RPC EDR, Tariq Solaija

  19. Prototyping • PK-01/99 400*400 mm2 double gap RPC, Italian bakelite 1999. • PK-02/00 Full-size RE 2/2 chamber, tested at GIF in 2000, phenolic bakelite gaps fabricated in Italy (   10 9  cm). • PK-03/01 Full-size RE 2/2 chamber, tested at GIF in 2001, melaminic bakelite gaps (   10 10  cm). • PK-04/02 Full-size RE 2/2, tested at GIF in 2002, gaps supplied from Korea (   10 10  cm). • Good results were achieved in all beam tests. Forward RPC EDR, Tariq Solaija

  20. RE 2/2 under test at GIF Forward RPC EDR, Tariq Solaija

  21. Production Plans • First low  chambers installation RE+2 11/04 • Chambers should be ready 3 months before the installation. • 72 chambers to be shipped from Pakistan 04/04 • Arrival in Geneva expected in 06/04 • Chamber tests prior to installation: 07/04 • Gas gaps delivery from Korea 03/03 • Procurement of materials should start 11/02 • Material procurement in Pakistan takes time: • Typical Order – Delivery delay ~ 4 – 6 months Forward RPC EDR, Tariq Solaija

  22. Production plans • Time T0 is assumed to be arrival of gaps from Korea. • We hope to produce 3 to 4 chambers / week. • Production of 432 chambers would take 108 to 162 weeks after time T0. Forward RPC EDR, Tariq Solaija

  23. Available resources • Manpower: • Physicists: 06 • Engineers 05 • Technicians 08 • Space: • Site – A Electronics testing Lab. 600 sq. ft • Site – B Chamber integration • & testing shop 1000 sq. ft • Site – C Mechanical assembly shop 4000 sq. ft • Total available space for RPC 5600 sq.ft (600 sq. m) Forward RPC EDR, Tariq Solaija

  24. Budget estimates & spending profile • Cost per chamber: 1350 CHF • Cost per FEB:200 CHF • Financial year 2002-2003,1500 FEBs:300000 CHF • Financial year 2003-2004,1500 FEBs:300000 CHF • Production of 216 chambers 2003-2004:291600 CHF • Production of 216 chambers 2004-2005:291600 CHF Forward RPC EDR, Tariq Solaija

  25. Q. A. & Proposed Chamber Tests Tests on gaps Gas leakage test Current vs HV of gaps before assembly Tests for Chamber Gas Flow and leakage Test Current vs HV Singles rate Cosmic Ray test Forward RPC EDR, Tariq Solaija

  26. Front end board • RPC Endcap group uses the 32 channel board designed by INFN (Bari). • 50 boards in final configuration have been fabricated and used during the beam tests by Korea, China and Pakistan in 2002 . • 3000 boards will be fabricated in bulk. Different board manufactures can produce these boards in two to four month period. Forward RPC EDR, Tariq Solaija

  27. Front-End Board for End-cap RPC Signal Input 8-ch ASIC LV Component Side Signal Output Solder Side Forward RPC EDR, Tariq Solaija

  28. Proposed FEB Testing FEB Rx. board TDC Input pulse Trigger Threshold All channels are simultaneously pulsed and TDC hits are checked against three threshold levels 100,150 and 200 mV. Input pulse level is varied during the test. TDC can also record inter channel delay. Forward RPC EDR, Tariq Solaija

  29. Chamber assembly area Forward RPC EDR, Tariq Solaija

  30. Chamber testing area Forward RPC EDR, Tariq Solaija

  31. Chamber testing electronics Forward RPC EDR, Tariq Solaija

  32. Gas mixing rack Forward RPC EDR, Tariq Solaija

  33. Summary • Chamber design for stations RE */2 & RE */3 is • ready and good results have been achieved in beam • tests. • Most of the resources & equipment is available to start • chamber production.However, some tooling can only be • designed and produced after EDR. Materials can also be • ordered in bulk after EDR approval. • Work on automatic 32 channel FEB testing program • is in progress.FEB production in bulk can be ordered • if satisfactory results are obtained in 2002 beam • tests completed recently, the data is being analyzed. Forward RPC EDR, Tariq Solaija

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