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When last we met…

LHC IRQ Interconnect Engineering Design Review January 29, 2002 T. Nicol – Fermilab tnicol@fnal.gov http://tdserver1.fnal.gov/nicol/index.html. When last we met…. First prototype (Q2P1). Interconnect layout (Q1 to Q2). Scope of Fermilab contribution.

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When last we met…

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  1. LHC IRQ Interconnect Engineering Design ReviewJanuary 29, 2002T. Nicol – Fermilabtnicol@fnal.govhttp://tdserver1.fnal.gov/nicol/index.html

  2. When last we met… T. Nicol

  3. First prototype (Q2P1) T. Nicol

  4. Interconnect layout (Q1 to Q2) T. Nicol

  5. Scope of Fermilab contribution • Supply all IR quadrupole magnet assemblies. • For the interconnects – supply: • interconnect bellows • connecting piping • TAS A and B absorbers • pipe supports • shield bridges • multi-layer insulation • interconnecting insulating vacuum sleeves • vacuum relief assemblies and pumpout ports • BPM connecting ports (but not the RF cables or connectors) • tie rods • Q1 vacuum end volume components except cold-to-warm transition • i.e. all interconnect components except cold bore vacuum components, vacuum bellows. T. Nicol

  6. Interconnect EDR-related cryostat EDR action items(numbers from original report) • 1. Interconnect pipe supports (IEDR – TP) • Action: Fermilab needs to complete the design for pipe support in the interconnect regions. • 2. Stability of tie rods under vacuum loads (IEDR – TN) • Action: Fermilab should complete their analysis of mechanical stability of the tie rods under vacuum loads. • 3. Use of automatic welding equipment (BOTH – TP) • Action: Fermilab is evaluating eliminating the beam pipe – cold mass differential expansion bellows which would increase the radial clearance in that area. • Action: Fermilab needs to identify all welds that will fall below the requested clearances of 45 mm radial and 130 mm axial. • Action: CERN and Fermilab need jointly to address viable solutions to any space-restricted welds. • 5. Interconnect region magnet splices (IEDR – ML) • Action: Fermilab needs to determine the length of the corrector bus splice in the interconnect region. • Action: Fermilab needs to ensure adequate flow area for quench venting at the interconnects. T. Nicol

  7. Interconnect EDR-related cryostat EDR action items (cont’d) • 7. BPM feedthrough flanges (IEDR – TP) • Action: Fermilab needs to add BPM cable feedthrough flanges to the design of the interconnects. • 9. Cold bore temperature in the interconnects (IEDR – TN) • Action: Fermilab needs to investigate how to maintain the cold bore at its specified temperature. • 12. IP end of Q1 (BOTH – TN) • Action: Fermilab is requested to propose a “shortest possible” IP end of the Q1 cryoassembly on the assumption that the BPM is located outside of the vacuum vessel. • Action: CERN needs to provide designs for the warm-to-cold transition, including stay-clear areas to Fermilab. • 18. Vacuum pumping and pressure relief ports (IEDR – TP) • Action: Fermilab needs to include an ISO-K-100 pumping flange in its design for the vacuum pumping port. T. Nicol

  8. Interconnect EDR-related cryostat EDR action items (cont’d) • 24. BPM location and interfaces (IEDR – TN) • Action: CERN needs to develop details of the BPM to enable Fermilab to complete the detailed design of the interconnect region. • Action: CERN needs to complete the Engineering Change Request process to formalize the change of BPM location. • 25. Cryostat bellows sleeves (IEDR – TP) • Action: Fermilab needs to complete the design of the bellows sleeves and instrumentation routing. • 26. Heat exchanger pipes (IEDR – TN) • Action: Fermilab is asked to provide CERN with details of the redesign of the heat exchanger connecting pipes. T. Nicol

  9. General interfaces… T. Nicol

  10. Q1 interface and assembly T. Nicol

  11. Q2 interface and assembly T. Nicol

  12. Q3 interface and assembly T. Nicol

  13. Q1 to Q2 interconnect layout T. Nicol

  14. Q2 to Q3 interconnect layout T. Nicol

  15. BPM interface… T. Nicol

  16. Cold bore flange (non-Q1) T. Nicol

  17. Cold bore flange and bpm connection T. Nicol

  18. Cold to warm transition interface… T. Nicol

  19. IP-end of Q1 from August 2000 T. Nicol

  20. IP-end of Q1 from August 2001 T. Nicol

  21. Cold to warm transition T. Nicol

  22. IP-end of Q1 piping layout T. Nicol

  23. Cold bore vacuum and absorber interface… T. Nicol

  24. Cold bore vacuum interconnects Q3 end Q2 to Q3 int Q1 to Q2 int Q1 end T. Nicol

  25. Absorbers TAS A TAS B T. Nicol

  26. Absorber construction concept T. Nicol

  27. Q1 41.28 MCBX 11.78 TAS A 8.04 Empty 0.47 Beam induced heat load estimates (N. Mokhov, Fermilab) T. Nicol

  28. TAS A and B design and performance parameters (R. Rabehl, Fermilab) • Material is copper. • TAS A is 127 mm OD, ~95 mm ID, 600 mm long, 27.2 kg. • TAS B is 127 mm OD, ~95 mm ID, 1200 mm long, 59.4 kg. • Three-piece construction. • Absorbers are cooled in series. • Within each absorber, the three pieces are cooled in parallel (each piece has a single longitudinal cooling channel. • Approximate heat loads: ~8 W for TAS A and 8.2 W for TAS B. • Helium flow required: ~0.2 g/s to maintain T < 20 K assuming 4.6 K, 3 bar supply. • Support system static heat load: ~0.25 W for TAS A, ~0.15 W for TAS B. T. Nicol

  29. Concerns • Absorber interface is closely coupled to cold bore vacuum components being developed at CERN. • Cold to warm transition details need to be made consistent with other components in the IP-end of Q1. • Need details of the Q1 cold bore tube and whether it is the same at each IR. T. Nicol

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