Status report on Micro Megas mechanics CERN PHDT
- Slides: 35
Status report on Micro. Megas mechanics CERN PH/DT Jordan Degrange / Francisco Perez Gomez CERN PH/DT 12/05/13
Content � Concept remind � Vacuum table manufacturing and measurements � MM panels design � Future plans 12/05/13 Jordan Degrange / Francisco Perez Gomez CERN PH/DT
Concept (1/2) � � A sandwich of two soft skin is glued without mechanical constraints. A sandwich is: o One glass fibre skin (0. 5 mm) o Aluminium honeycomb surrounded with an aluminium frame o Second glass fibre skin (0. 5 mm) � Sandwich schematic view Jordan Degrange/Francisco Perez Gomez PH/DT
Concept (2/2) � Manufacturing concept o The skins are sucked with two vacuum tables o The vacuum table surfaces are perfectly flat o The vacuum table surfaces are set in parallel position Jordan Degrange / Francisco Perez Gomez PH/DT
Vacuum table components Dimensions: 1300 X 600 � Manufactured at CERN � Outer surface: Epoxy gel coat ‘’EP Gel coat Weiβ’’ � (1+1 reinforced layer). � Structural layer: Glass fibre “Glasgewebe 92150 FK-144 345 g/m 2 Leinwand’’ + AXSON Epolam 5015 (5 layers). 4 perforated sides aluminium honeycomb. � Araldite 2011 �
Vacuum table exploded view Perforated Al Honeycomb (60 mm) Al inserts (Ø 40 mm) Gel coat + Glass fibre (3. 5 mm) Al profile (60 X 30 mm) Jordan Degrange - Francisco Perez Gomez CERN PH/DT Glass fibre (3 mm)
MM Vacuum table (1300 mm. X 60 mm) 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 � Temperature: 20°C � Planarity : 0. 077 mm � Temperature : 21°C � Planarity : 0. 08 mm � Temperature : 22. 5°C � Planarity : 0. 03 mm � There’s a temperature influence on flatness to be investigated. CERN Metrology lab CERN PH/DT Jordan Degrange - Francisco Perez Gomez CERN PH/DT
MM panel Design � 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 Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Assembly tool 4 reference holes. Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Board on Assembly tool Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Board alignment 4 reference holes. Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Board alignment 2 pins Ø 5 g 6 X Ø 5, 5 g 6 Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Board Alignment Ref. Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Reference plugs gluing Ø 5. 50 Ø 5. 0 Jordan Degrange - Francisco Perez Gomez CERN PH/DT Ø 5. 50
PCB Alignment pin Cyanoacrylate 3 M EC 100 Reference plug glued Jordan Degrange - Francisco Perez Gomez CERN PH/DT
All plugs glued Board Alignement Ref. Spacer Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Board installation on Vacuum table Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Board indexation Ref. … vacuum pump ON Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Aluminium frame assembly Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Aluminium frame assembly 2 reference holes per profile 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
2 nd board installation on 2 nd VT Ref. Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Vacuum Tables alignment Vacuum Table Ref. Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Vacuum tables alignment Precision shims (11, 4 mm) Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Polymerisation Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Mesh support frame � Assembled and glued on drift panel using alignment holes � Mesh glued on well defined surface. � Acts as gas manifold. � Large gluing area. � Ground connection Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Mesh support frame Ground connection holes Gas IN/OUT Joint groove Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Mesh support frame Cleaning channel Surface glued on drift panel Gas distribution holes (Ø 0. 5 mm Ø 1. 5 m m) Gas distribution channel Gas IN/OUT (Ø 2, 5 mm) Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Board connection Fixation pins and ground connection Board Alignment pin Deflection = 0. 01 mm Jordan Degrange - Francisco Perez Gomez CERN PH/DT
View of Zebra connector encapsulated Jordan Degrange - Francisco Perez Gomez CERN PH/DT
Future plans and tasks 15. 01. 14 � 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/EM 2
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