Proposal for NSW chamber PCB layout and alignment

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Proposal for NSW chamber PCB layout and alignment (updates) Givi Sekhniaidze CERN, 14 -15

Proposal for NSW chamber PCB layout and alignment (updates) Givi Sekhniaidze CERN, 14 -15 April 2014 1

Some remarks about mechanical layout After the discussions with G. Spigo and M. Ciapetti

Some remarks about mechanical layout After the discussions with G. Spigo and M. Ciapetti and checking the sector layout and overlap regions the angles for the MM modules defined: • LM 1 – 33° • LM 2 – 8° • SM 1 & SM 2– 21° Small and large sectors will have the different pitches for the strips (450 μm for LM and 425 μm for SM) The PCBs will NOT have the equal height: • For intermediate PCBs (PCB 2, 3, 4 for LM/SM 1 and PCB 7 for LM/SM 2) it will be calculated as 1024 x Pitch (460. 8 mm for LM and 435. 2 mm for SM) • The rest of the module height will be equally distributed between external PCBs • The height of the external PCBs will be slightly larger then intermediate (example: 474. 4 mm vs. 460. 8 mm for LM 2), but due to the spacer/mesh frame (25 mm minimum) the active area will be less. Givi Sekhniaidze CERN, 14 -15 April 2014 2

Givi Sekhniaidze CERN, 14 -15 April 2014 3

Givi Sekhniaidze CERN, 14 -15 April 2014 3

Givi Sekhniaidze CERN, 14 -15 April 2014 4

Givi Sekhniaidze CERN, 14 -15 April 2014 4

Overlap Givi Sekhniaidze CERN, 14 -15 April 2014 5

Overlap Givi Sekhniaidze CERN, 14 -15 April 2014 5

Proposal for PCB alignment (MSW version) • We propose to have one pair of

Proposal for PCB alignment (MSW version) • We propose to have one pair of the precise hole and slot in the central part of the PCB • Precise hole will be used ONLY once during positioning on the gluing table • In the frame of the panel could be glued precise insert (Inox, PEEK, etc. ) for alignment with other panels Assembling holes Precise slot Precise hole D Assembling holes Givi Sekhniaidze CERN, 14 -15 April 2014 6

Proposal for multi-PCB alignment 3 board version Precise holes in the table Panel assembling

Proposal for multi-PCB alignment 3 board version Precise holes in the table Panel assembling table Givi Sekhniaidze CERN, 14 -15 April 2014 7

PCB in-plane alignment Additional Targets/images Precise hole Read-out strips MSW version MMFE-8 Strip 513

PCB in-plane alignment Additional Targets/images Precise hole Read-out strips MSW version MMFE-8 Strip 513 Strip 512 Givi Sekhniaidze CERN, 14 -15 April 2014 8

Alignment check of PCBs on readout panels Measurements taken with a laser machine from

Alignment check of PCBs on readout panels Measurements taken with a laser machine from NA 62 lab (CERN-PH -DT)

� Readout Eta Scan direction Srrips roted to the PCB edge Alignmen t pin

� Readout Eta Scan direction Srrips roted to the PCB edge Alignmen t pin Scan performed on both sides of the readout eta panel with the precise pin inserted in the same hole on the two sides

� Pins alignment (x-axis of 1 side re-scaled)

� Pins alignment (x-axis of 1 side re-scaled)

� Strips far from the pin δ < 20 μm • Strips close to

� Strips far from the pin δ < 20 μm • Strips close to the pin δ ≈ 35 μm

Assembling holes for LM 2 chamber • As an example, part of the PCB

Assembling holes for LM 2 chamber • As an example, part of the PCB 6 from LM 2 chamber • The assembling holes are equally distributed in the frame area • Only one hole in the center of the connector area Givi Sekhniaidze CERN, 14 -15 April 2014 13

MMFE board and spacer/mesh frame • The dimensions of the MMFE board will be

MMFE board and spacer/mesh frame • The dimensions of the MMFE board will be 50 mm x 215 mm • The space between spacer/mesh frame and edge of the R/O board – 55 mm (50 mm MMFE width + 5 mm clearance) MSW NSW MMFE Givi Sekhniaidze CERN, 14 -15 April 2014 14

Assembling holes in connector area • Preferable position for assembling holes w. r. t.

Assembling holes in connector area • Preferable position for assembling holes w. r. t. connector would be in the center of the connector (free space between two Zebra connectors) Assembling holes R/O strips Zebra connectors Givi Sekhniaidze CERN, 14 -15 April 2014 15

Summary • The draft version for the PCB layouts are ready – Missing the

Summary • The draft version for the PCB layouts are ready – Missing the routing for the Zebra connectors – need position of the holes – Number and positions of the interconnection holes to be decided a. s. a. p. – Final decision about dimensions and the shape of the spacer/mesh frame (combined or separate) is needed to finalize the PCB design (resistive strips, HV distribution, pillars, etc. ) • Alignment method for the PCB positioning – MSW version + Saclay + other ideas? • Other targets/images for in-plane alignment to be implemented in PCB design? • Other wishes, ideas, suggestions? Givi Sekhniaidze CERN, 14 -15 April 2014 16