1. Services mock-up Full-scale mock-up of one half end-cap.
9 disks + alignment disk + bulkhead.
Disk spacing as in Aachen drawing cms1348L (Note: disagrees with Breuker parameter booklet!)
Multi-service cables
Fibre-optic ribbons
Cooling pipes
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Nick Lumb

2. Cooling tubes Compact mechanics allows MSC to be
tightly packed around tubes
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Nick Lumb

3. Cooling (cont.) Petal manifold 3mm too low with respect to disk
Flexible section
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Nick Lumb

4. Multi-service cables Space problem at bulkhead
Requires mods to BH at 80/260
degree radials
Agreed with pixel group
Same problem at 170/350 degrees
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Nick Lumb

5. MSC (cont.) Bonnevaux cabling scheme at bulkhead seems to work.
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Nick Lumb

6. Optical read-out Checked fibre lengths on dummy petals
Space in service channels
to thread ribbon connectors
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Nick Lumb

7. Optical read-out (cont.)
Mechanics allows fan-out adapters to be withdrawn to edge of disk.
Honeycomb plate prevents fibres from touching petals on opposite disk.
Avoid conflicts with alignment lasers.
Checked motion of fibres and ribbons during insertion/removal.
Determined length of ribbon needed to exit service channel.
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Nick Lumb

8. Opto ribbon lengths (1)
Total length = AB (390 mm) + BC + CD + DE mm mm
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Nick Lumb

9. Ribbon lengths (2) Service channel section filled with flat cable.
Bundles routed to cassette sectors.
Lengths averaged for 8 cables per bundle.
Reference point at z=2910, r=1300.
Repeated for all phi positions.
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Nick Lumb

10. Ribbon lengths (3)
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Nick Lumb

11. Ribbon lengths (4) All lengths include 300 mm of free fibre.
Final lengths rounded up to nearest batch length.
Batches 4050 to 6000 mm, step size 150 mm.
Spares: approximately 5% in each batch.
Final tables submitted to F. Vasey.
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Nick Lumb

12. To do Verify MSC routing at bulkhead 170/350 degree radials.
Determine cable lengths at bulkhead for all phi positions.
Study possibility of not using fixation plate for MSCs at bulkhead.
Investigate scheme for gas sealing and check space available is OK.
Build serious prototypes for:
Fan-out adapter mechanics;
Mechanics to fix cooling tubes to disks;
Cooling loops (outsourced to industry).
17/11/2018
Nick Lumb