1. Experience with 1 x 1m 2 and 2 x 1 m 2 MM assembly CERN/PH/DT Hans Danielsson, Francisco Perez Gomez, Philippe Lenoir, Pierre-Ange Giudici, Francois Garnier, Jerome Bendotti 29-30/11/12Small wheel MM, Frascati

2. Content Design Material Assembly Conclusion 29-30/11/12Small wheel MM, Frascati

3. Principle layout 29-30/11/12Small wheel MM, Frascati Jörk Wotschack

4. Stiffening panel Rohacell 29-30/11/12Small wheel MM, Frascati 5.00 PCB1 PCB2 Jörk Wotschack

5. Experience with the 1x1m 2 Photos 29-30/11/12Small wheel MM, Frascati 2 MM of 1m x 0.5m glued to the Rohacell panel Stiffening panel

6. Design 2x1m 2 4 Micromegas PCBs ~2 m ~1m 29-30/11/12Small wheel MM, Frascati

7. Material 2x1m 2 Aluminum honeycomb Alloy 3003 - cell size 9mm - density 2.6 - dim. 1250x2500 mm T10 mm Alloy 3003 - cell size 9mm - density 2.6 - dim. 1250x2500 mm T15 mm Aluminum in closeouts, gas distribution and spacer between drift and MM Glass-fiber reinforced plastics (GFRP)for the skins Araldite: gluing at room temperature 29-30/11/12Small wheel MM, Frascati

8. Assembly of a test panel ~0.2m x 2m Uniform thickness skins (10-20  m) Calibrated spacers 29-30/11/12Small wheel MM, Frascati

9. 29-30/11/12Small wheel MM, Frascati

10. Validation Laser device mounted on an optical bench It measures the distance relative to a known reference 29-30/11/12Small wheel MM, Frascati

11. Results (example) X Distance (mm) 29-30/11/12Small wheel MM, Frascati

12. Conclusion A first attempt has been made to assembly flat panels using a flat table (flatness 15  m) The first results are promising and the next step is to make the first full size 2m x 1m panels (10 mm and 15 mm).The first panel this week and the second beginning of next week. The mounting of the mesh is planned for end of next week. Next steps: Complete the assembly of a single plane Evaluate the assembly procedures and tooling Study how to make a complete “multiplet” Look at alternative procedures and towards series production 29-30/11/12Small wheel MM, Frascati

13. Spares (discussion) 29-30/11/12Small wheel MM, Frascati