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

2. Outline From HQ to MQXF Layout and lengths Lhe vessel Bus-bars 09/04/2013 Paolo Ferracin2

3. HQ vs MQXF 09/04/2013 Paolo Ferracin3

4. Layout 09/04/2013 Paolo Ferracin4 By H. Prin

5. Q1 and Q3 5 65 60 456030130 4 m (scale 10:1) 0.5 m Magnetic length Distance from end of magnetic length to end of the conductor 60 mm 6045 3060130 65 End shoe thickness 30 mm (LE), 45 mm (RE) Extension for Nb3Sn – NbTi connection 130 mm 65 End plate 65 mm 4 m (scale 10:1) 140 mm left (mm) 205 mm (lyra) (140 mm “free” + 65 mm “shared” with internal connection box) Internal connection box (+ nuts/bolts for the end plate) 65 mm 65 G10 insulation piece 10 mm 10 205 mm (lyra) (140 mm “free” + 65 mm “shared” with internal connection box) By Susana Izquierdo Bermudez

6. Lhe vessel 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 09/04/2013 Paolo Ferracin6

7. Welded LHe vessel Tack welding stainless steel mid-plane block 09/04/2013 Paolo Ferracin7

8. Welded LHe vessel Assembly of full-length structure (LQ procedure) 09/04/2013 Paolo Ferracin8

9. Welded LHe vessel Full-length structure on support feet 09/04/2013 Paolo Ferracin9

10. Welded LHe vessel Tack welding of half shell to mid-plane blocks 09/04/2013 Paolo Ferracin10 Magnet moved from support feet to rollers

11. Welded LHe vessel Rotation and placement of second half-shell 09/04/2013 Paolo Ferracin11

12. Welded LHe vessel Welding of two half shells 09/04/2013 Paolo Ferracin12

13. Welded LHe vessel 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? 09/04/2013 Paolo Ferracin13

14. 14 M. Anerella Cold Mass Assembly I Subassembly of outer yoke and shells (use existing HQ methods): 1.Preload each 1 m section 2.Assemble into 2 m sections & replace keys 3.Assemble into 4 m section 4.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. 15 M. Anerella Cold Mass Assembly III 4. Slide yoke into shell, engaging alignment rollers in shell holes Roller slide details LARP QXF Structure Working Group

16. 16 M. Anerella 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. 17 M. Anerella Cold Mass Assembly V 1.Remove 2 nd and 3 rd alignment features 2.Weld fiducials 3.Remove 1 st and 4 th alignment features 4.Weld fiducials LARP QXF Structure Working Group

18. Powering scheme (artwork by E. Todesco) Four 17 kA cables + several other smaller ones – Correctors, trims 09/04/2013 Paolo Ferracin18

19. Bus-bars “Phase-I upgrade” option – Bus-bar in 1 (or 2) cooling holes Only 2 holes used for cooling 09/04/2013 Paolo Ferracin19 By Susana Izquierdo Bermudez

20. Bus-bars Field distribution at the cooling hole region – Less than 0.5 T Impact on field quality: – Δb 1, Δa 1 1) 09/04/2013 Paolo Ferracin20 zoom By Susana Izquierdo Bermudez

21. Bus-bars Final configuration need to be analysed, but forces seem manageable 09/04/2013 Paolo Ferracin21 By Susana Izquierdo Bermudez

22. Bus-bar Free area for cooling Considered case – 2x cooling holes for cooling – 1x cooling hole for busbar – No busbar slot in the structure Free space: ~142cm 2 – 1x cooling hole (46cm 2 ) – 4x bladder slot (23cm 2 ) – 8x alignement slot (28cm 2 ) – 4x axial rod space (45cm 2 ) 09/04/2013 Paolo Ferracin22 By Mariusz Juchno

23. Proposal Removal of bus-bar slot and use of 1 (or 2) cooling holes 09/04/2013 Paolo Ferracin23