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ATLAS-NSW CERN MMM workshop MM Wedges made of 4 modules

ATLAS-NSW CERN MMM workshop MM Wedges made of 4 modules. 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.

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ATLAS-NSW CERN MMM workshop MM Wedges made of 4 modules

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  1. ATLAS-NSWCERN MMM workshopMM Wedges made of 4 modules 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 21-22 of February 2013

  2. OUTLINE • Layout with MM wedge made of 4 modules (quadruplets) • Version C to take in account the envelope of the sector • Version D in progress to simplify the layout • (ATLAS layout drawing is available on CDD: ATUMHS___0004) • Design of the spacer-frame and of the module • A composite architecture with in-plane corridors included • Quadruplets are fixed with 4 kinematic mounts • sTGC wedge interface : 2 cases • The weight of the sTGC wedge is directly transferred to the structure of the wheel • The sTGC wedge is fix on the spacer-frame • Mechanical simulations • The spacer frame is fixed on the wheel with 3 kinematic supports • The spacer frame is fixed on the wheel with 4 kinematic supports • Thermal simulations • A first approach with temperature gradient (electronic power deposition?) CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  3. Layout of the MM modules • The assembly drawing has been updated (version C) and provided to the MM community on the 13th of February, but new modifications should be taken in account CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  4. Layout of the MM modules • From version B to version C • The sectors have been enlarged to increase the azimuthal overlaps • Inner radius has been reduced from 982 to 917mm, to increase the active area (eta=2.7) • No change for outer radius (eta=1.3) to keep clearance w.r.t. the position of the EIL4 chamber CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  5. Layout of the Mm modules • A reference drawing has been provided to define the NSW envelope in ATLAS environment (ATUMHS___0004 on CDD) • Large and small MM modules must be modified according to their integration in the envelopes of the sectors CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  6. Layout of the Mm modules • Exchange of 3D models has been initialized to have more realistic dimensions to define the alignment system, the services and kinematic supports • FE electronics and services should be defined asap to check if we have enough space inside the spacer-frame (~50mm) • 100mm space has been required between the wheel structure and the envelope of the sectors to be able to fix the sectors on the structure • In-plane alignment must be added (additional bars or using of the spacer-frame?) CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  7. Layout of the MM modules • Next step: From version C to version D • Optimization of the size of the MM modules to stay inside the envelopes without lost of the overlaps • Simplification of the shape of the sectors, if simplification of the structure of the wheel is possible and if the “ears” are not necessary for overlaps • Increasing of space for in-plane alignment system if we cannot add the new longer bars inside the spokes (if using spacer-frame instead of the bars is possible?) CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  8. Design of the spacer-frame • A composite architecture with in-plane corridors included (~130kg) • Spacer = Central plates = Rohacell30mm (or honeycomb) + 2 FR4 laminates 0.5mm • Discontinuous central plate to provide space for alignment corridors • Frame = T profiles = aluminum profiles • Holes for alignment corridors M4 M3 M2 kinematic mount M1 12 central plates (Rohacell +FR4) 2 aluminum T profiles CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  9. Design of the module • The quadruplets are made of PCBs (0.5mm), G10 laminates (0.5mm) and honeycombs (~10mm) • The weight of the 8 MM is ~440Kgs • Services are not included M4 M3 M2 M1 M1 Each module is fixed on the frame with 4 kinematic mounts CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  10. sTGC wedges interface • Case 1: The weight of sTGC wedge is directly transferred to the structure of the wheel • The kinematic mounts of the sTGC wedge can be installed on the spacer-frame but exactly at the same location of the kinematic mounts of the spacer-frame • The handling of the full sector must be done with the same conditions Kinematic mount of the sector Principle Same location for the kinematic mounts Kinematic mount of the sTGC wedge CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  11. sTGC wedges interface • Case 2: The sTGC wedge is fixed on the spacer-frame • The design of the spacer-frame should take in account the weight of the 2 sTGC wedges (local reinforcement of the T profiles) Fixation of sTGC directly on the spacer-frame CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  12. mechanical analysis • The goalis to have under control the absolute positioning of the MM modules and sTGCwedges • The mechanical structure of the spacer-frame should limit the displacement of each module and wedge under 100-150 microns (strips and wires must be parallel) • Loading conditions • Self weight • In all cases the tilt of the wheel at 0.7° is considered • Boundary conditions • Degrees of freedoms are driven by the location of the different kinematic mounts 1 unidirectional sliding link (2nd coordinate) 1 (or 2) fully sliding link 1 pivot link CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  13. Mechanical analysis • A first set of simulations have been done • With 3 kinematic mounts at optimized location (“bessel points”) • Location of degrees of freedom (different kinematic mounts) has been changed according to the orientation of the sectors, for spacer-frame and also for modules • Equivalent Young modulus has been used for the modules • Case1: Without the sTGC weight CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  14. Mechanical analysis • Vertical sector 05 with the optimization of the kinematic mounts Pivot link Unidirectional link (2nd coordinate) Fully sliding link CEA-Saclay/DSM/Irfu/SIS/LCAP - Patrick PONSOT

  15. Mechanical analysis • Vertical sector 05 with the optimization of the kinematic mounts Spacer-frame only Sector (spacer-frame + modules) Modules only (Quadruplets) Maximum displacement ~0.06mm Maximum displacement ~0.1mm CEA-Saclay/DSM/Irfu/SIS/LCAP - Patrick PONSOT

  16. Mechanical analysis • Vertical sector with the optimization of the kinematic mounts: Displacement of modules on each direction Y displacement 0 to +0.06mm X displacement 0 to +0.02 Z displacement -0.03 to 0mm CEA-Saclay/DSM/Irfu/SIS/LCAP - Patrick PONSOT

  17. Mechanical analysis • Horizontal sector with the optimization of the kinematic mounts Pivot link Unidirectional sliding link (2nd coordinate) Fully sliding link Fully sliding link CEA-Saclay/DSM/Irfu/SIS/LCAP - Patrick PONSOT

  18. Mechanical analysis • Horizontal sector with optimization of the kinematic mounts Sector (spacer-frame + modules) Spacer-frame only Modules only (Quadruplets) Maximum displacement ~0.02mm Maximum displacement ~0.03mm CEA-Saclay/DSM/Irfu/SIS/LCAP - Patrick PONSOT

  19. Mechanical analysis • Horizontal sector with the optimization of the kinematic mounts: Displacement of modules on each direction Y displacement -0.01to 0mm X displacement 0 to +0.01mm Z displacement -0.01 to +0mm CEA-Saclay/DSM/Irfu/SIS/LCAP - Patrick PONSOT

  20. Mechanical analysis • A second set of simulations have been done • With 4 kinematic mounts on the spacer-frame • To use the same location as for sTGCsupports • To be far away from the center of the wheel (small space between spokes) • The stiffness of each panel of the module has been considered • Case1: Without sTGC weight 4 kinematic mounts CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  21. Mechanical analysis • Vertical sector 05 with optimization of the kinematic mounts Spacer-frame only Sector (spacer-frame+modules) Modules only (Quadruplets) Maximum displacement ~0.06mm Maximum displacement ~0.05mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  22. Mechanical analysis • Vertical sector 13 at 180° Pivot link Unidirectional sliding link (2nd coordinate) Fully sliding links Pivot link Unidirectional sliding link (2nd coordinate) Fully sliding links CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  23. Mechanical analysis • Vertical sector 13 at 180° with optimization of the kinematic mounts Spacer-frame only Sector (spacer-frame+modules) Modules only (Quadruplets) Maximum displacement ~0.1mm Maximum displacement ~0.07mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  24. Mechanical analysis • Sector at 45° Pivot link Unidirectional sliding link (2nd coordinate) Pivot link Fully sliding links Unidirectional sliding link (2nd coordinate) Fully sliding links CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  25. Mechanical analysis • Sector at 45° without optimization of the kinematic mounts (worst case) Displacement of the modules will be reduced by changing of the location of the unidirectional sliding of the modules Spacer-frame Sector (spacer-frame+modules) Modules (Quadruplets) Maximum displacement ~0.18mm Maximum displacement ~0.18mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  26. Mechanical analysis • Horizontal sector Pivot link Pivot link Unidirectional sliding link (2nd coordinate) Unidirectional sliding link (2nd coordinate) Fully sliding links Fully sliding links CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  27. Mechanical analysis • Horizontal sector with optimization of the kinematic mounts Spacer-frame only Sector (spacer-frame+modules) Modules only (Quadruplets) Maximum displacement ~0.04mm Maximum displacement ~0.03mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  28. Mechanical analysis • Statement (without thermal analysis) : With 4 kinematic mounts on the spacer-frame which are not at the optimized position (not at “Bessel point”), it should be possible to keep the displacement of the MM modules under 0.1mm (but services should be added, local deformation of the support must be studied) • Next slide: Just to estimate the impact of the fixation of the modules on the spacer-frame without kinematic mounts (Warning! The same exercise must be done with thermal analysis before to conclude) CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  29. Mechanical analysis • Vertical sector without kinematic mounts between the modules and the spacer-frame (without sTGCweight) Stiffness of the modules and of the spacer-frame are compatible but the worst case will come from thermal analysis Spacer-frame only Modules only (Quadruplets) Sector (spacer-frame+modules) Maximum displacement ~0.03mm Maximum displacement ~0.01mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  30. Mechanical analysis • Next slides : We consider that the sTGC wedges have been fixed directly on the spacer frame without kinematic mounts (only kinematic mounts outside the spacer frame) Fixation of sTGC directly on the spacer-frame without kinematic mounts (4 supports) CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  31. Mechanical analysis • Vertical sector with sTGC weight Spacer-frame only Sector (spacer-frame+modules) Modules only (Quadruplets) Maximum displacement ~0.15mm Maximum displacement ~0.07mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  32. Mechanical analysis • Horizontal sector with sTGCweight Spacer-frame only Sector (spacer-frame+modules) Modules only (Quadruplets) Maximum displacement ~0.7mm Maximum displacement ~0.02mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  33. Mechanical analysis • Statement 2: With the weight of the sTGC wedges applied on the spacer-frame (4 supports), we have a strong impact on the deformation of the spacer but not on the displacement of the MM modules.Thekinematic mounts are needed to fix the sTGC on the spacer-frame to maintain the relative position of the sTGC w.r.t. the MM modules. • Statement 3: If the stiffness of the quadruplets (MM modules and sTGC wedges) is confirmed with mock-up (*), we can use a spacer-frame to do the assembly of them(Young modulus at least 17000 MPa) • But, we cannot conclude before thermal analysis (next step, we just begin the work)! * Measurement of the stiffness of the composite panel is planned at Saclay CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  34. thermal analysis • The goal is to have under control the deformation mode of the modules with the alignment systems • To define the kinematic mounts of the modules (Z displacements?) • In this case we need a more precise description of the geometry of the module • Loading conditions • Self weight • In all cases the tilt of the wheel at 0.7° is considered • Temperature gradient ΔT=2°C • Today, the location of the electronic power depositionis not defined • Boundary conditions • Same boundary conditions as for mechanical analysis CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  35. thermal analysis • A first approach • With 4 kinematic mounts on the spacer-frame • The stiffness of each panel of the module has been considered Very preliminary CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  36. thermal analysis • Behavior of the modules • With 4 kinematic mounts on the module • The stiffness of each panel of the module has been considered Very preliminary CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  37. thermal analysis Very preliminary • Behavior of the module M4 • With 4 kinematic mounts on the module • The stiffness of each panel of the module has been considered X displacement ~0mm Y displacement -0.13 to 0mm Z displacement -0.03 to +0.02mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  38. thermal analysis • Horizontal sector Very preliminary Spacer-frame only Sector (spacer-frame+modules) Modules only (Quadruplets) Maximum displacement ~0.1mm Maximum displacement ~0.1mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  39. thermal analysis • Sector at 45° Very preliminary Displacement of the modules can be reduced by changing of the location of the unidirectional sliding kinematic support Spacer-frame only Sector (spacer-frame +modules) Modules only (Quadruplets) Maximum displacement ~0.2mm Maximum displacement ~0.2mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  40. thermal analysis Very preliminary • Statement for the first approach with temperature gradient: Not critical with 4 kinematic mounts on the spacer-frame which are not at the optimized position (not at “Bessel point”), it should be possible to keep the displacement of the MM modules under 0.1mm (but services should be added, local deformation of the support must be studied) • Next slide: Just to estimate the impact of the fixation of the modules on the spacer-frame without kinematic mounts CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  41. THERMal analysis • Vertical sector 05 without kinematic mounts on the modules Deformation mode is not under control, kinematic mount are needed Very preliminary Spacer-frame only Sector (spacer-frame+modules) Modules only (Quadruplets) Maximum displacement ~0.55mm Maximum displacement ~0.18mm CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

  42. Thank you for your attention ! 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 DSM IrfuSIS/LCAP (PC N°12, Bt 123)Patrick PONSOT CERN MMM workshop - CEA-Saclay/DSM/Irfu - Patrick PONSOT

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