Experience with 1 x 1m2
and 2 x 1 m2 MM
assembly
CERN/PH/DT
Hans Danielsson , Francisco Perez Gomez, Philippe Lenoir,
Pierre-Ange Giudici, Francois Garnier, Jerome Bendotti
Small wheel MM, Frascati
29-30/11/12
Content
 Design
 Material
 Assembly
 Conclusion
Small wheel MM, Frascati
29-30/11/12
Principle layout
Jörk Wotschack
Small wheel MM, Frascati
29-30/11/12
Stiffening panel
5.00
PCB2
PCB1
Rohacell
Jörk Wotschack
Small wheel MM, Frascati
29-30/11/12
Experience with the 1x1m2
 Photos
Stiffening panel
Small wheel MM, Frascati
2 MM of 1m x 0.5m
glued to the Rohacell
panel
29-30/11/12
Design 2x1m2
4 Micromegas PCBs
~1m
~2 m
Small wheel MM, Frascati
29-30/11/12
Material 2x1m2
 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
Small wheel MM, Frascati
29-30/11/12
Assembly of a test panel ~0.2m x 2m
Uniform
thickness skins
(10-20mm)
Calibrated
spacers
Small wheel MM, Frascati
29-30/11/12
Small wheel MM, Frascati
29-30/11/12
Validation
• Laser device mounted on an
optical bench
• It measures the distance relative
to a known reference
Small wheel MM, Frascati
29-30/11/12
Distance (mm)
Results (example)
X
Small wheel MM, Frascati
29-30/11/12
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
Small wheel MM, Frascati
29-30/11/12
Spares (discussion)
Small wheel MM, Frascati
29-30/11/12