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QXF magnet integration

QXF magnet integration. Paolo Ferracin. Joint LARP/CM20 HiLumi meeting Napa Valley, CA, USA 8-10 April, 2013. Outline. From HQ to MQXF Layout and lengths Lhe vessel Bus-bars. HQ vs MQXF. Layout. By H. Prin. Q1 and Q3. By Susana Izquierdo Bermudez. 0.5 m. 4 m (scale 10:1).

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QXF magnet integration

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  1. QXF magnet integration Paolo Ferracin Joint LARP/CM20 HiLumi meeting Napa Valley, CA, USA 8-10 April, 2013

  2. Outline Paolo Ferracin From HQ to MQXF Layout and lengths Lhe vessel Bus-bars

  3. HQ vs MQXF Paolo Ferracin

  4. Layout By H. Prin Paolo Ferracin

  5. Q1 and Q3 By Susana Izquierdo Bermudez 0.5 m 4 m (scale 10:1) 4 m (scale 10:1) 0.5 m 0.5 m 10 45 60 65 130 30 60 45 10 65 65 60 30 130 10 65 65 10 60 65 (mm) 205 mm (lyra) (140 mm “free” + 65 mm “shared” with internal connection box) 205 mm (lyra) (140 mm “free” + 65 mm “shared” with internal connection box) 140 mm left Magnetic length Distance from end of magnetic length to end of the conductor 60 mm End shoe thickness 30 mm (LE), 45 mm (RE) Extension for Nb3Sn – NbTi connection 130 mm G10 insulation piece 10 mm End plate 65 mm Internal connection box (+ nuts/bolts for the end plate) 65 mm

  6. Lhe vessel Paolo Ferracin • 10 mm thick stainless steel shell around segmented aluminum shell • Two concepts • Two half-shells welded around the Al shell • Same stainless steel vessel contains • Q1a+Q1b or Q2+correctors • Contact between Al and SS shells • Inertia tube • Same stainless steel vessel or 2 welded longitudinally • Gap between Al and SS shells

  7. Welded LHe vesselTack welding stainless steel mid-plane block Paolo Ferracin

  8. Welded LHe vesselAssembly of full-length structure (LQ procedure) Paolo Ferracin

  9. Welded LHe vesselFull-length structure on support feet Paolo Ferracin

  10. Welded LHe vesselTack welding of half shell to mid-plane blocks Magnet moved from support feet to rollers Paolo Ferracin

  11. Welded LHevesselRotation and placement of second half-shell Paolo Ferracin

  12. Welded LHe vesselWelding of two half shells Paolo Ferracin

  13. Welded LHe vessel Paolo Ferracin • Welding “groove” in the aluminum shell (mid-plane) for Argon gas • Tension after welding ~70 MPa to avoid separation between Al shell and vessel after cool-down • Separation must be avoided • From 2D comp., minimum effect of welding on coil stress • What about 3D effects?

  14. Cold Mass Assembly I • Subassembly of outer yoke and shells (use existing HQ methods): • Preload each 1 m section • Assemble into 2 m sections & replace keys • Assemble into 4 m section • Install into stainless steel shell • Install yoke/shell subassembly onto alignment fixture: • Aluminum shell is centered at holes • Stainless steel shell is on adjustable ball transfer rollers • (shown in subsequent slides) LARP QXF Structure Working Group

  15. Cold Mass Assembly III 4. Slide yoke into shell, engaging alignment rollers in shell holes Roller slide details LARP QXF Structure Working Group

  16. Cold Mass Assembly IV • Adjust inner yoke height and engage alignment details • Remove roller slides • Install bladders & energize all simultaneously: • Remove shell support (ball transfer rollers) after initial bladder pressure is applied • adjust pressures by quadrants if needed to maintain equal gaps • Remove outer yoke keys, install load keys LARP QXF Structure Working Group

  17. Cold Mass Assembly V • Remove 2nd and 3rd alignment features • Weld fiducials • Remove 1st and 4th alignment features • Weld fiducials LARP QXF Structure Working Group

  18. Powering scheme (artwork by E. Todesco) Paolo Ferracin • Four 17 kA cables + several other smaller ones • Correctors, trims

  19. Bus-bars By Susana Izquierdo Bermudez Paolo Ferracin • “Phase-I upgrade” option • Bus-bar in 1 (or 2) cooling holes • Only 2 holes used for cooling

  20. Bus-bars By Susana Izquierdo Bermudez zoom Paolo Ferracin • Field distribution at the cooling hole region • Less than 0.5 T • Impact on field quality: • Δb1, Δa1 < 1 unit Δbj,Δaj < 0.1 units (j>1)

  21. Bus-bars By Susana Izquierdo Bermudez Paolo Ferracin • Final configuration need to be analysed, but forces seem manageable

  22. Bus-barFree area for cooling By Mariusz Juchno Paolo Ferracin • Considered case • 2x cooling holes for cooling • 1x cooling hole for busbar • No busbar slot in the structure • Free space: ~142cm2 • 1x cooling hole (46cm2) • 4x bladder slot (23cm2) • 8x alignement slot (28cm2) • 4x axial rod space (45cm2)

  23. Proposal Paolo Ferracin Removal of bus-bar slot and use of 1 (or 2) cooling holes

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