1. Irfu.cea.fr ATLAS-NSW 4 TH MMM WORKSHOP SELECTION CRITERIA FOR THE DECISION ON THE MM CONSTRUCTION SCHEME 24-25 of June 2013 Patrick PONSOT for the CEA-Saclay-Irfu group: F.Bauer, P.Daniel-Thomas, E.Ferrer-Ribas, J.Galan, W.Gamache, A.Giganon, P-F.Giraud, P.Graffin, S.Hassani, S.Herlant, S.Hervé, F.Jeanneau, H.LeProvost, O.Meunier, A.Peyaud, Ph.Schune

2. OUTLINE 2013/06/24-25 | PAGE 2 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  General considerations  Qualification of the mechanical prototypes M1 to M4 and full size Geometry Other criteria (e.g. sealing)  Additional parameters (e.g. impact on the infrastructures and the tooling; risk analysis…etc.)

3. GENERAL CONSIDERATIONS 2013/06/24-25 | PAGE 3 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  For the MM construction, we need of a PL, a TC and a RC, but this is not enough …  We need also to form a small group to organize the work in all the production sites. Maybe 2 persons per production site…  Concerning the schedule, the status of the infrastructures to build the quadruplets is not the same in all institutes. If the jobs from the institutes are strongly interconnected, the assembly process could be broken.  E.g. we just received the granite table at Saclay… and the mechanical prototype M4 cannot be finished on July…

4. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 4 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN Criteria and measurements to qualify the geometry of the mechanical prototypes  Alignment of the dummy PCBs (~450 mm) for each layer  Alignment of 2 layers (Doublet)  Alignment of the 2 doublets (Quadruplet)  Planarity of the quadruplet  Parallelism of the 4 layers  Geometry of the quadruplet within a temperature gradient, fixed with kinematic mounts on the spacer  Geometry of the quadruplet within a temperature gradient, fixed by screwing on the spacer  Positioning of the quadruplets on the spacer before and after applying of a temperature gradient

5. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 5 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  Alignment of dummy PCBs (~450 mm) for each layer: < 20  m Some “targets” should be add on the dummy PCBs. They must be accessible for measurement after assembly Optical or mechanical measurement on a large CMM 2 precise metallic inserts are glued on each board (one of the hole is elongated) Positioning tooling is made of towers which are equipped with the optical cameras

6. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 6 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  Alignment of 2 layers (Doublet): < 20  m Idem: Some “targets” should be add on the dummy PCBs. They must be accessible for measurement after assembly Optical or mechanical measurement on a large CMM 2 precise metallic inserts on each board Positioning tooling are used to align the top and down PCBs (expansible pins)

7. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 7 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  Alignment of 2 doublets (Quadruplet): < 20  m Idem: Some “targets” should be add on the dummy PCBs. They must be accessible for measurement after assembly Optical or mechanical measurement on a large CMM Same principle as for a doublet Positioning tooling are used to align the top and down doublets (expansible pins)

8. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 8 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  Planarity: < 50  m (with the mesh in place, tension < 15MPa/cm) Measurement of the doublets during the construction on the granite table, with a specific tooling, like a ruler equipped with gauges, or a track-arm Measurement of the 2 external sides after assembly on a large CMM  Parallelism: < 80  m (with the mesh in place, tension < 15MPa/cm) In the same way, measurement of the 2 sides with a common reference (granite table) or with a vertical support on a large CMM

9. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 9 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  Geometry within a temperature gradient (  T=2°C), with the quadruplet on kinematic mounts Warming of one side Measurement of the deformation on the both sides (spacers inside the drift gap)  Geometry within a temperature gradient (  T=2°C), with the quadruplet fixed on an aluminum spacer Same method

10. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 10 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  Positioning of the quadruplets on the spacer before and after applying of a temperature gradient (  T=2°C) Measurement of the deformation on a large CMM Measurement of the targets which have been used to align the PCBs (relative position of the wedges or modules) Large CMM @ Freiburg 6.5x1.5x1.2 m 3

11. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 11 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN Other criteria to qualify the mechanical prototypes  Sealing of the quadruplets (gluing, O-ring…) A sealing test should be done with 6mbars Exposure of the O-ring to radiations should be considered (material)  Deformation with gas pressure Measurement of the 2 external panels with gas pressure 6mbars  Space for electronics and services

12. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 12 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN Other criteria to qualify the mechanical prototypes  Dead zones (spacers, frames, …) and radial overlaps The width of the frames of the modules should be optimized Internal profiles to glue the PCBs should be considered

13. QUALIFICATION of M1to M4 and of FULL SIZE WEDGE 2013/06/24-25 | PAGE 13 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN Other criteria to qualify the mechanical prototypes  Dead zones (spacers, frames, …) and radial overlaps Radial overlaps: different size for inner and outer modules The geometry of the spacer is not the same for modules or full size wedge

14. ADDITIONAL PARAMETERS 2013/06/24-25 | PAGE 14 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN  Technical and organizational risks (not exhaustive) Assembly procedure Using of the existing granite tables and cleaning rooms ? Handling of large and flexible components (special tools) Difficulty to apply the tension of the mesh for a large surface Large tooling for testing (e.g. text box for PCBs before gluing) Failure during production and commissioning Lost of full size components (RO layer, …) Gas leaks with long frames Lost of a full size wedge Sharing of the work To avoid to have only one large infrastructure and test bench at CERN (planning, human resources) Sharing of the work should preserve the interest of the institutes Coordination of the tasks could be very complex if all the institutes are strongly interconnected (planning, impact on human resources) Complicated logistic Storage of large components in the institutes Transport of large components with humidity and temperature controls

15. DSM Irfu SIS/LCAP (PC N°12, Bt 123) Patrick PONSOT Commissariat à l’énergie atomique et aux énergies alternatives Centre de Saclay | 91191 Gif-sur-Yvette Cedex T. +33 (0)1 69 08 79 30 | F. +33 (0)1 69 08 89 47 Etablissement public à caractère industriel et commercial | RCS Paris B 775 685 019 2013/06/24-25 Thank you for your attention ! 4th MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT & Patrick GRAFFIN | PAGE 15