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MM mechanical prototypes

MM mechanical prototypes. Full wedge option At CERN. Purpose. Demonstrate feasibility Setup of basic infrastructure Gain experience with construction/assembly ideas/schemes Materials Procedures Precision (for me not the main objective) Produce objects that can be measured

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MM mechanical prototypes

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  1. MM mechanical prototypes Full wedge option At CERN G. Sekhniaidze/J. Wotschack

  2. Purpose • Demonstrate feasibility • Setup of basic infrastructure • Gain experience with • construction/assembly ideas/schemes • Materials • Procedures • Precision (for me not the main objective) • Produce objects that can be measured • Establish an Assembly Manual G. Sekhniaidze/J. Wotschack

  3. CERN mechanical prototype • Full-wedge small sector quadruplet • Eta and stereo doublet • All panels of equal thickness: 11-12 mm • Standard Al profiles of t=10 mm as frames • Al honeycomb of t=10 mm • Skins = 0.5 mm (FR4) • Glue gaps ≈ few 100 µm • Drift gap spacers: 5 mm • Total thickness: 75–80 mm G. Sekhniaidze/J. Wotschack

  4. Dimensions 70 – 80 mm Dead area: 50 mm Space for electronics: 50 mm 10+ 10+ 10+ 10+ 10+ Eta strips 20 mm Stereo strips Electronics boards 5 5 5 5 Space for electronics (50 mm in phi) MM multiplet stack (10+: 11 or 12 mm) G. Sekhniaidze/J. Wotschack

  5. Collaborative effort • CERN, Lecce, Saclay, … more collaborators are welcome • Drawings and calculations: Lecce and CERN • Infrastructure and tooling: CERN, Saclay • Technical work: CERN, Lecce, Saclay • Evaluation: all (two summer students for mechanical) G. Sekhniaidze/J. Wotschack

  6. What could/should be included • Realistic materials and glues • Realistic thickness and segmentation of PCBs • Space for on-chamber electronics boards • Simplified cooling and cabling channels • We foresee to insert heating wires into the cooling channels to simulate electronics/cooling • Gas channels and seals (to allow for gas pressure tests) • Mesh frame (but not necessarily the mesh) • T-sensors (a few) to allow for test measurements • Other ??? G. Sekhniaidze/J. Wotschack

  7. The table • Size: 4 x 2.5 m • Flatness: ≤ 20 µm • Location: B16 • Available: mid May G. Sekhniaidze/J. Wotschack

  8. Assembly scheme G. Sekhniaidze/J. Wotschack

  9. Using Skin suction Tool Vacuum Clarinet gas X 5 Vacuum Vacuum Vacuum Rohacell honeycomb Precision insert Skin (G10) Expansive glue Precised shim G. Sekhniaidze/J. Wotschack

  10. Stiffback • Simple stiffback structure with suction heads (following small test structure) used for 2 x 1 m2 prototype • CERN-DT group is working on a more final system using a perforated honeycomb structure with a perforated lower skin • Work in progress • Small 50 x 50 cm2 system under construction • Large system if prototype successful 60 mm G. Sekhniaidze/J. Wotschack

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