Experience with 1 x 1m2 and 2 x 1 m2 MM

assemblyCERN/PH/DT

Hans Danielsson , Francisco Perez Gomez, Philippe Lenoir, Pierre-Ange Giudici, Francois Garnier, Jerome Bendotti

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Small wheel MM, Frascati

ContentDesign

Material

Assembly

Conclusion

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Small wheel MM, Frascati

Principle layout

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Jörk Wotschack

Small wheel MM, Frascati

1 x 1 m2 sketch (closed)

Stiffening panel

Rohacell

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5.00

PCB1 PCB2

Jörk Wotschack

Small wheel MM, Frascati

Experience with the 1x1m2

Photos

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2 MM of 1m x 0.5mglued to the Rohacell panel

Stiffening panel

Small wheel MM, Frascati

Design 2x1m2

4 Micromegas PCBs

~2 m

~1m

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Small wheel MM, Frascati

Material 2x1m2

Aluminum honeycombAlloy 3003 - cell size 9mm - density 2.6 - dim.

1250x2500 mm T10 mmAlloy 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

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Small wheel MM, Frascati

Assembly of a test panel ~0.2m x 2m

Uniform thickness skins (10-20mm)

Calibrated spacers

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

Small wheel MM, Frascati

Validation • Laser device mounted on an

optical bench• It measures the distance

relative to a known reference

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Small wheel MM, Frascati

Results (example)

X

Distance (mm)

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Conclusion A first attempt has been made to assembly flat panels using a

flat table (flatness 15 mm)

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

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Small wheel MM, Frascati

Spares (discussion)

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