1. CERN PH/DT 30/01/14 Francisco Perez Gomez CERN PH/DT

2.  Concept remind  Vacuum table manufacturing and measurements  MM panels design  Construction of the first panel ◦ Measurements and results  Status and future plans 30/01/14 Francisco Perez Gomez CERN PH/DT

3.  A sandwich of two soft skin is glued without mechanical constraints.  A sandwich is: o One glass fibre skin (0.5mm) o Aluminium honeycomb surrounded with an aluminium frame o Second glass fibre skin (0.5mm)  Sandwich schematic view Francisco Perez Gomez CERN PH/DT 30/01/14

4.  Manufacturing concept o The skins are sucked with two vacuum tables o The vacuum table surfaces are perfectly flat o The vacuum table surfaces are set in parallel position Francisco Perez Gomez CERN PH/DT 30/01/14

5.  Dimensions: 1300X600  Manufactured at CERN  Use granite table (flatness <10  m) as mould  Outer surface: Epoxy gel coat ‘’EP Gel coat Weiβ’’ (1+1 reinforced layer).  Structural layer: Glass fibre “Glasgewebe 92150 FK-144 345g/m2 Leinwand’’ + AXSON Epolam 5015 (5 layers).  4 perforated sides aluminium honeycomb.  Araldite 2011 30/01/14 Francisco Perez Gomez CERN PH/DT

6. Gel coat + Glass fibre (3.5mm) Glass fibre (3mm) Perforated Al Honeycomb (60mm) Al profile (60X30mm) Al inserts (Ø40mm) 30/01/14

7. Francisco Perez Gomez CERN PH/DT 30/01/14

8. Francisco Perez Gomez CERN PH/DT Perforated Al honeycomb 30/01/14

9. Francisco Perez Gomez CERN PH/DT 30/01/14

10. CERN Metrology labCERN PH/DT  Temperature: 20°C  Planarity : 0.077mm  Temperature : 21°C  Planarity : 0.08mm  Temperature : 22.5°C  Planarity : 0.03mm  There’s a temperature influence on flatness to be taken into account (work at constant temperature ± 0.2°C). Francisco Perez Gomez CERN PH/DT 30/01/14

11.  Reference holes on boards for alignment  Ultem plugs to avoid drilling panels after assembly  All plugs are precisely pre-glued on the board using a dedicated tool  Aluminium frame pre-assembled on tool  Aluminium honeycomb  Araldite 2011 is the best candidate for gluing  Panel manufacturing in one shot Francisco Perez Gomez CERN PH/DT 30/01/14

12. 4 reference holes. Francisco Perez Gomez CERN PH/DT 30/01/14

13. 4 reference holes. Francisco Perez Gomez CERN PH/DT 30/01/14

14. Ref. Francisco Perez Gomez CERN PH/DT 30/01/14 2 pins Ø5g6 X Ø6,5g6

15. Ø5.50 Ø5.0 Francisco Perez Gomez CERN PH/DT Ø5.50 30/01/14

16. Francisco Perez Gomez CERN PH/DT Alignment pin Reference plug glued Cyanoacrylate 3M EC50 30/01/14

17. Ref. Spacer Board Alignement Francisco Perez Gomez CERN PH/DT 30/01/14

18. Ref. Francisco Perez Gomez CERN PH/DT … vacuum pump ON 30/01/14

19. Francisco Perez Gomez CERN PH/DT 30/01/14

20. 2 reference holes per profile Francisco Perez Gomez CERN PH/DT 30/01/14

21. Francisco Perez Gomez CERN PH/DT 30/01/14

22. Francisco Perez Gomez CERN PH/DT 30/01/14

23. Ref. Francisco Perez Gomez CERN PH/DT 30/01/14

24. Vacuum Table Ref. Francisco Perez Gomez CERN PH/DT 30/01/14

25. Francisco Perez Gomez CERN PH/DT Precision shims (11,6mm) 30/01/14

26. Francisco Perez Gomez CERN PH/DT 30/01/14

27. Francisco Perez Gomez CERN PH/DT 30/01/14

28. Francisco Perez Gomez CERN PH/DT

29. 30/01/14

30. Francisco Perez Gomez CERN PH/DT 30/01/14

31. Upper side viewSome measurements  Top side flatness: 160µm (max-min)  Bottom side flatness: 90µm (max-min) 30/01/14 Francisco Perez Gomez CERN PH/DT

32. 30/01/14 Francisco Perez Gomez CERN PH/DT Planarity: 40 µm (rms)

33. 30/01/14 Francisco Perez Gomez CERN PH/DT Planarity: 22 µm (rms)

34.  Idea:  Produce a spacer made from several pieces.  Straight pieces have the same profile with different lengths for mass production  Two symetric models of corner pieces  Two ref holes/ element for alignment  Use granite table in order to obtain a flat, parallel and precise surface for the gluing of the mesh  Liquid glue (Axson Epolam 5015) for the mesh gluing  Use “capillary effect” Francisco Perez Gomez CERN PH/DT 30/01/14

35.  Assembled and glued on drift panel using alignment holes  Mesh glued on well defined surface.  May act as gas manifold.  Large gluing area.  Ground connection Francisco Perez Gomez CERN PH/DT 30/01/14

36. Francisco Perez Gomez CERN PH/DT  The gluing procedure is first tested in a smaller prototype (200X200mm) In particular the assembly of the corner pieces and leak tightness were verified.  Create a new plane, parallel to drift panel 30/01/14 Drift Gluing zones Drift

37. Francisco Perez Gomez CERN PH/DT 30/01/14 Laying on precise shims on granite table Teflon pins

38. 30/01/14 Francisco Perez Gomez CERN PH/DT Plexiglass mould Mesh frame Mesh support installed under “press”

39. Francisco Perez Gomez CERN PH/DT 30/01/14 Injection points distance 100mm

40. Francisco Perez Gomez CERN PH/DT 30/01/14 Planarity 40µm

41.  Prepare all needed elements for 1 panel assembly (frame, plugs, pins, etc..)  Manufacturing of 1 full set of mesh support.  Investigation of temperature and humidity influence on VT flatness  Drill reference holes on vacuum tables.  Assembly and QC of 1 panel for tooling and procedure validation  Test on gas distribution  Test on mesh gluing  Ground connections tests  Test on zebra fixation  Electrical tests on Zebra connectors Francisco Perez Gomez CERN PH/DT 30/01/14

42.  Understand deformations on the first panel  Improve and tune the panel manufacturing procedure  Build the first real panel  …. Francisco Perez Gomez CERN PH/DT 30/01/14

43. Francisco Perez Gomez CERN PH/DT 30/01/14

44. Francisco Perez Gomez CERN PH/DT 30/01/14

45. Francisco Perez Gomez CERN PH/DT Alignment pin Board Fixation pins and ground connection Deflection = 0.01mm 30/01/14

46. Francisco Perez Gomez CERN PH/DT 30/01/14