Status report on MicroMegas mechanics

Status report on MicroMegas

mechanics

CERN PH/DT

12/05/13Jordan Degrange / Francisco Perez Gomez CERN PH/DT

Concept remind Vacuum table manufacturing and

measurements MM panels design Future plans

12/05/13Jordan Degrange / Francisco Perez Gomez CERN PH/DT

Content

A sandwich of two soft skin is glued without mechanical constraints.

A sandwich is:o One glass fibre skin (0.5mm)o Aluminium honeycomb surrounded with an aluminium frameo Second glass fibre skin (0.5mm)

Sandwich schematic view

Jordan Degrange/Francisco Perez Gomez PH/DT

Concept (1/2)

Manufacturing concepto The skins are sucked with two vacuum tableso The vacuum table surfaces are perfectly flato The vacuum table surfaces are set in parallel position

Jordan Degrange / Francisco Perez Gomez PH/DT

Concept (2/2)

Dimensions: 1300X600 Manufactured at CERN Outer surface: Epoxy gel

coat ‘’EP Gel coat Weiβ’’ (1+1 reinforced layer).

Structural layer: Glass fibre “Glasgewebe 92150 FK-144 345g/m2 Leinwand’’ + AXSON Epolam 5015 (5 layers).

4 perforated sides aluminium honeycomb.

Araldite 2011

Vacuum table components

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Vacuum table exploded view

Gel coat + Glass fibre (3.5mm)

Glass fibre (3mm)

Perforated Al Honeycomb (60mm)

Al profile (60X30mm)Al inserts

(Ø40mm)

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

MM Vacuum table (1300mmX600mmX60mm)

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Vacuum Table Cross section

Perforated Al honeycomb

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Vacuum table inserts

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Vacuum table QC

CERN Metrology lab CERN PH/DT

Temperature: 20°C Planarity : 0.077mm

Temperature : 21°C Planarity : 0.08mm

Temperature : 22.5°C Planarity : 0.03mm

There’s a temperature influence on flatness to be investigated.

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Reference holes on boards for alignment Ultem plugs to avoid drilling panels after

assembly All plugs are precisely pre-glued on the

board using a dedicated tool Aluminium frame pre-assembled on tool Aluminium honeycomb Araldite 2011 is the best candidate for

gluing Panel manufacturing in one shot

MM panel Design

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

4 reference holes.

Assembly tool

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Board on Assembly tool

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

4 reference holes.

Board alignment

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

2 pins Ø5g6 X Ø5,5g6

Board alignment

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Ref.

Ref.

Board Alignment

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Ø5.50

Ø5.0

Reference plugs gluing

Ø5.50

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

PCB Alignment

Alignment pin

Reference plug gluedCyanoacrylate 3M

EC100

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Ref.

Spacer

Board

Alignement

All plugs glued

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Board installation on Vacuum table

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Ref.

Board indexation

… vacuum pump ON

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Aluminium frame assembly

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

2 reference holes per profile

Aluminium frame assembly

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Aluminium frame installation

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Honeycomb installation

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Ref.

Ref.

2nd board installation on 2nd VT

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Vacuum Table Ref.

Vacuum Tables alignment

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Vacuum tables alignment

Precision shims (11,4mm)

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Polymerisation

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Assembled and glued on drift panel using alignment holes

Mesh glued on well defined surface.

Acts as gas manifold.

Large gluing area. Ground connection

Mesh support frame

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Mesh support frame

Joint groove

Ground connection holes

Gas IN/OUT

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Gas IN/OUT (Ø2,5mm)

Gas distribution channel

Gas distribution holes (Ø0.5mmØ1.5mm)

Cleaning channel

Surface glued on drift panel

Mesh support frame

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

Board connection

Alignment pin

Board

Fixation pins and ground connection

Deflection = 0.01mm

Jordan Degrange - Francisco Perez Gomez CERN PH/DT

View of Zebra connector encapsulated

Prepare all needed elements for 1 panel assembly (frame, plugs, pins, etc..)

Manufacturing of 1 full set of mesh support. Investigation of temperature and humidity influence on

VT flatness Drill reference holes on vacuum tables. Assembly and QC of 1 panel for tooling and procedure

validation Test on gas distribution Test on mesh gluing Ground connections tests Test on zebra fixation Electrical tests on Zebra connectors

Francisco Perez Gomez / Hans Danielsson CERN PH/DT/EM2

Future plans and tasks 15.01.14