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

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)


MM Vacuum table (1300mmX600mmX60mm)


Vacuum Table Cross section

Perforated Al honeycomb


Vacuum table inserts


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.


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


4 reference holes.

Assembly tool


Board on Assembly tool


4 reference holes.

Board alignment


2 pins Ø5g6 X Ø5,5g6

Board alignment


Ref.

Ref.

Board Alignment


Ø5.50

Ø5.0

Reference plugs gluing

Ø5.50


PCB Alignment

Alignment pin

Reference plug gluedCyanoacrylate 3M

EC100


Ref.

Spacer

Board

Alignement

All plugs glued


Board installation on Vacuum table


Ref.

Board indexation

… vacuum pump ON


Aluminium frame assembly


2 reference holes per profile

Aluminium frame assembly


Aluminium frame installation


Honeycomb installation


Ref.

Ref.

2nd board installation on 2nd VT


Vacuum Table Ref.

Vacuum Tables alignment


Vacuum tables alignment

Precision shims (11,4mm)


Polymerisation


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


Mesh support frame

Joint groove

Ground connection holes

Gas IN/OUT


Gas IN/OUT (Ø2,5mm)

Gas distribution channel

Gas distribution holes (Ø0.5mmØ1.5mm)

Cleaning channel

Surface glued on drift panel

Mesh support frame


Board connection

Alignment pin

Board

Fixation pins and ground connection

Deflection = 0.01mm


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

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

Documents

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