1. Overview short model design and structures P. Ferracin on behalf of the MQXF collaboration MQXF Workshop on Structure, Alignment, and Electrical QA CERN 2 February, 2016

2. Acknowledgments CERN – A. Ballarino, H. Bajas, M. Bajko, B. Bordini, J.C. Perez, S. Izquierdo Bermudez, P. Fessia, C. Fichera, P. Grosclaude, M. Guinchard, M. Juchno, F. Lackner, L. Oberli, H. Prin, J. Rysti, E. Rochepault, S. Sequeira Tavares, E. Todesco, G. Vallone BNL – M. Anerella, A. Ghosh, J. Schmalzle, P. Wanderer FNAL – G. Ambrosio, R. Bossert, G. Chlachidze, L. Cooley, E. Holik, S. Krave, F. Nobrega, M. Yu LBNL – D. Cheng, D.R. Dietderich, R. Hafalia, M. Marchevsky, H. Pan, G. Sabbi, X. Wang CEA Saclay – H. Felice LASA – V. Marinozzi, M. Sorbi Tampere Univerisity of Technology – T. Salmi 02/02/2016 Paolo Ferracin2

3. Outline Magnet design Schedule of short models and prototypes Overview of support structures for short models Update on support structures for prototypes Some open points 02/02/2016 Paolo Ferracin3

4. Overview of MQXF design 10/12/2014 Paolo Ferracin4 OD: 630 m Stainless steel shell – 8 mm for LHe containment Aluminum shell – 29 mm thick Iron yoke – Gaps open – 4-fold symmetry Iron master plates – Bladder and keys Iron pad Aluminum axial rods Aluminum bolted collars G10 pole key Ti alloy poles

5. Overview of MQXF design 02/02/2016 Paolo Ferracin5

6. Overview of MQXF design 02/02/2016 Paolo Ferracin6

7. Coil and G10 pole key Cooling holes in the pole – 8 mm ∅ every 50 mm 10/12/2014 Paolo Ferracin7

8. Aluminum bolted collars 50 mm thick laminations Radial contact with coil and azimuthal contact with pole key (for alignment) No coil pre-load function 10/12/2014 Paolo Ferracin8

9. Iron and stainless steel bolted pads Coil-pack sub-assembly 50 mm thick laminations Alignment with respect to collars Stainless steel laminations in the ends No coil pre-load function 10/12/2014 Paolo Ferracin9

10. Iron masters and alignment-loading keys Slots for – Bladders – Loading keys – Alignment keys Flat surface 10/12/2014 Paolo Ferracin10 Nested into features in the load pads (and yokes)

11. Yoke-shell sub-assembly 4 stacks of lamination assembled with ties rods Shell pre-load with temporary keys Tack-welding blocks bolted to the yoke Segmented shell with cut-outs for cold-mass assembly 10/12/2014 Paolo Ferracin11

12. Coil-pack sub-assembly in shell-yoke-sub- assembly and pre-loading 10/12/2014 Paolo Ferracin12

13. Aluminium axial rod insertion and assembly of end-plate 10/12/2014 Paolo Ferracin13

14. Backing-strip 10/12/2014 Paolo Ferracin14

15. Welded LHe vessel (stainless steel shell) 10/12/2014 Paolo Ferracin15

16. Outline Magnet design Schedule of short models and prototypes Overview of support structures for short models Update on support structures for prototypes Some open points 02/02/2016 Paolo Ferracin16

17. Project schedule Models and Prototypes 02/02/2016 Paolo Ferracin17

18. Outline Magnet design Schedule of short models and prototypes Overview of support structures for short models Update on support structures for prototypes Some open points 02/02/2016 Paolo Ferracin18

19. MQXFS Support Structure 0 1 + 1 shell segments 50 mm thick laminations Axial pre-load on LE Qualified in first half 2015 with dummy coils – MQXFSD0 02/02/2016 Paolo Ferracin19

20. MQXFSD0 Instrumentation – 8 CERN strain gauge stations ( and z) in shell – 12 CERN strain gauges stations ( and z) in dummy coils – 4 strain gauges z on rods – Total: 44 gauges 2 loadings at CERN 2 cool-downs at CERN – Each with a thermal cycles 02/02/2016 Paolo Ferracin20

21. MQXFS Support Structure 1 ½ + 1 + ½ shell segments – Identical to str. 0, then cut at LBNL 50 mm thick laminations LE axial pre-load Qualified in first half 2015 with dummy coils – MQXFSD1 02/02/2016 Paolo Ferracin21

22. From structure 0 to structure 1 02/02/2016 Paolo Ferracin22

23. MQXFSD1 Instrumentation – 4 CERN + 4 LARP strain gauge stations ( and z) in shell – 4 CERN + 12 LARP strain gauges stations ( and z) in dummy coils – 4 strain gauges z on rods – Total: 52 gauges 1 loading at LBNL 1 cool-down at LBNL – No thermal cycles 02/02/2016 Paolo Ferracin23

24. MQXFS1 (or AT1) 02/02/2016 Paolo Ferracin24 Structure 1 used for first short model – ½ + 1 + ½ shell segments – Thick laminations – LE axial pre-load Assembled/loaded in summer 15, cooldown in winter Coil 3, 5, 103, 104

25. MQXFS1 (or AT1) Instrumentation – 4 CERN + 4 LARP strain gauge stations ( and z) in shell – 4 CERN + 4 LARP strain gauges stations ( and z) in dummy coils – 4 strain gauges z on rods – Total: 36 gauges 1 loading at LBNL 1 cool-down + warm-up at FNAL Next cool-down soon at FNAL 02/02/2016 Paolo Ferracin25

26. MQXFS Support Structure # 2 ½ + 1 + ½ shell segments – Fabricated with final lengths and new smaller cut-outs All other components from structure 0 LE axial pre-load To be qualified in first half 2016 with dummy coils – MQXFSD2 02/02/2016 Paolo Ferracin26

27. MQXFSD2 Instrumentation – 4 CERN strain gauge stations ( and z) in shell – 12 CERN strain gauges stations ( and z) in dummy coils – 4 strain gauges z on rods – Total: 36 gauges 1 loading + cool-down performed at CERN To be done (Feb. 16) – Thermal cycle, II loading, II cool-down and thermal cycle at CERN 02/02/2016 Paolo Ferracin27

28. MQXFS Support Structure 3 and 4 ½ + 1 + ½ shell segments Thin lamination for pad and yoke RE axial pre-load 2 sets of components delivered at CERN – Except 1 set of shells and 1 set of collars To be qualified at CERN in first half Mar./Apr. 2016 with dummy coils – MQXFSD3 02/02/2016 Paolo Ferracin28

29. From structure 1-2 to structure 3-4 Nuts and pre-loading system moved from LE to RE – Reduced lengths of the leads  field quality – Easier pre-loading operation – Increased distance between Q1 magnets 02/02/2016 Paolo Ferracin29

30. Short model support structures overview Structure 1 Used in – MQXFSD1 – MQXFS1 02/02/2016 Paolo Ferracin30 Structure 2 Used in – MQXFSD0 – MQXFSD2 – MQXFS2 Structure 3 Not assembled To be used in – MQXFSD3 – MQXFS3 – MQXFS5 Structure 4 Not assembled – Missing shell and collars To be used – MQXFSD4(?) – MQXFS4

31. Short models strain gauge data overview 02/02/2016 Paolo Ferracin31 MQXFSD0 44 gauges CERN-type MQXFSD1 52 gauges CERN-type, LARP type MQXFSD2 36 gauges CERN-type MQXFS1 36 gauges CERN-type, LARP type 120 strain gauges

32. Outline Magnet design Schedule of short models and prototypes Overview of support structures for short models Update on support structures for prototypes Some open points 02/02/2016 Paolo Ferracin32

33. 02/02/2016 Paolo Ferracin33

34. LARP prototype structure Structure MQXFA1 – 4 m long – Same concept as short model structure 1 and 2 – To be delivered in spring 2016 Structure MQXFA2 – Same concept as short model structure 1 and 2 but with ARMCO steel – Procurement to be started in spring / summer 2016 Structure MQXFA3 – Procurement in end of 2017, early 2018 02/02/2016 Paolo Ferracin34

35. CERN prototype structure Baseline with thin laminations Procurement to be launched after the qualification of structure 3 in April/May 2016 – Material ordered sooner 02/02/2016 Paolo Ferracin35

36. Outline Magnet design Schedule of short models and prototypes Overview of support structures for short models Update on support structures for prototypes Some open points 02/02/2016 Paolo Ferracin36

37. Thin/Thick iron laminations Structure 3 qualified with dummy coils in May 2016 – Is it enough? If no major issues, there is time to launch the fabrication for structure of CERN first prototype What about LARP prototypes? – Not possible for MQXFA1 – Tight for MQXFA2 – Definitely possible for MQXFA3 CERN is procuring sufficient iron (ARMCO) plate also for MQXFA series What about structure 4? – Shell and collar missing Possible to use structure 0 shells and cut them (like for MQXFSD1) Recycle collar from MQXFS1 – Still, the radius has been slightly changed – Would be useful to have a “final” short model structure for LARP, if laminations are chosen – Assembled/cooled down with dummy coils at LBNL? 02/02/2016 Paolo Ferracin37

38. Lhe containment When? – MQXFS1c, after high pre-load test in MQXFS1b, in 08/16 – MQXFS2b in 06/16 02/02/2016 Paolo Ferracin38

39. Cold mass design Complete design of magnet end region – Connection box – End cover – Bus/bars and lyra – …in general, more detailed design of cold mass to verify possible real estate issues 02/02/2016 Paolo Ferracin39

40. Appendix 02/02/2016 Paolo Ferracin40

41. Project schedule 02/02/2016 Paolo Ferracin41