nSQP’s

ER Bundle “final” design

D. Giugni / INFN Milano

D. Giugni2011-07-14 nSQP's meeting

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nSQP’s

2011-07-14 nSQP's meeting 2

Assumption• I am going to present what I would call “final design” of the ER bundles... with some caveats:

– The transmission properties of the data line are not covered here. We cannot say that it is fully qualify. A “system” test with all the parts (E-board, ER Bundle, Optoboard) has not been done yet.

– I assume hereafter that it is or, it will be, ok.Therefore the design is “final” if the system test will show good results.

– If it is true, then the design is really final:• Wires, boards, connectors• Mechanics: connector shells, strain releases, assembly procedures• Shielding (*) and grounding.

– (*) There are still two options for the shielding braids: tin copper and carbon. It does not affect the design nor the fabrication procedure

D. Giugni

nSQP’s

2011-07-14 nSQP's meeting 3

Details from PP0 to Opto-box

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nSQP’s

2011-07-14 nSQP's meeting 4

Details at PP0

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Details at PP1

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PP1 End Plate

Silicon feed through

Heat shrinkable tubingNOMEX Braid

KEVLAR Braid

Tin Cu/ C fiber+

AWG 28 Tin Cu drain

MYLAR Foil

MWS Wires

KEVLAR Braid+

Drain wire

“Outside” to Optobox“Inside” to PP0

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Details of the Connector

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KEVLAR Braid

Heat Shrinkable tubing

Cu/ C Braid

Brass Hollow Plate Brass Ferule

MWS Wires

Drain Wire

Shell(5um Ti/Ni coating)

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Connector Board assembly

D. Giugni 2011-07-14 nSQP's meeting

Tin Cu Braid

Heat Shrinkable

tubing

KEVLAR Braid

Ferule

Hollow Brass Plate

Silder

Drain Wire

Connector Shell

(not Coated here)

nSQP’s

2011-07-14 nSQP's meeting 8

Connector Shell Sputtering• Sputtering seems to be ok.• Tested 2um Ti coating• Good adhesion• Next layer can be ~3um Cu or Ni

Ni preferred (by me)Total coauting th. ~5um

• Fast an almost inexpensive

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Uncoated SLA shell

2um Ti spattered

nSQP’s

2011-07-14 nSQP's meeting 9

D-bundle production plan• Re-spin the Cable and D/B Connector board. Some already in hands.

Need to load with connectors and capacitors• Re-spin the production of the new shells (both D&B type)• Spattering available.• All braids (NOMEX, KEVLAR, Cu and Carbon fiber) in hands• Silicon casting available at CERN and ready to go.

Can assemble 14 D-ER Bundles with all the final parts... however we are in a vacation period.– 10 bundles with Ti Cu braid– 4 Bundles with CF braid.

D. Giugni