LHCb Upgrade

Optical Fibers from Cavern to the Surface

- what has been done ? - prototypes status and next coming steps - what is missing for final installation

10th October 2014

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- LS2 planning tight / many activities in UX foreseen - want links ready to do the commissioning of first electronics as soon as possible

Goal (already decided end of 2012):

~ 15 000 fibers UX85 to Surface ready for beginning of LS2

2013 Study passages through the 2 pits available PM85 pit chosen

Disadvantages Pass thought an LHC side (US85, PM85): - agreement of LHC (space taken, integration in 3D mockup…) documentation provided (ECR), LMC approval. - passage above Cryo equipment during installation additional precautions to take - dependent on machine activities access given by them / LHC planning

Advantages in a ‘technical area’ (no need special derogation/safety exit) no passage through the LHCb shielding wall (difficult before LS2) no space take in the existing ‘LHCb’ cable trays (probably happy to have for LS2)

Laurent Roy

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PZ85 shaft

New LHCb Control Room

End point:New server

Rooms

PM85 shaft

PX85 shaft

Start point: ~3 areas in

UX85

New Power Transformer ?

HV cells

SG8

passage for the

prototypes

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Two types of installation possible: blowing (+splicing) or pre-connectorized

- technical Pros and Cons of each solution could not yet help for the choice- Cost relatively similar: also not help to chose already now- Installation of prototypes with both possibilities in our environment to give more information

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Solution compatible for both types found for the supports:

rails + clamps

bundle of 7 trunk cables (for pre-connectorized) 50mm tube (for blowingin 7 mini tubes)

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- 600mm standard cable trays installed in UX85-C (Cryo part)

Supports installation: has been designed directly for the full quantity

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cable trays installed in UX85-C (Cryo part)

-Try to minimize the curvesbut cannot avoid few of them

However minimum bending radius (76 cm) respected everywhere

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Large scaffoldings mounted-for new cable trays on the wall /US85-for passages through the ‘siporex’ wall

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Scaffolding above Cryo racks

New cable tray

2 holes drilled in UX85-US85 wall-for fibers coming from Bunker+Calo+Muon fibers -for Velo side (Velo, UT, Rich1)

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New cable tray for Muon+Calo

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closing before LHC powering tests safety / leak of He

2nd holenew supports in US85

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Difficult passage (between large air duct and the wall)‘en drapeau’

Special support tomove ducts away from power cables (with a safe distance of 25 cm requested)

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Scaffolding bottom PM85 + Cryo cold box protection

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2 Cryo exhausts moved away(bottom of the pit)

limited spaceallowed by Cryo and LHC integrationin PM85

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Special support for ~85m vertical part in the pit

rails on each sides

mechanical characteristics report provided

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Mechanical supports studied to occupy the maximum of space available between 2 ‘cryo transfer lines’ 20 tubes ø50mm could be installed x 7 = 140 cables x 144 fibers =20160 fibers is the maximum that should be possible to install

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junction between pit and gallery at the surface

Boring ~ 3.5m of concrete + rubble to reduce length: -30m

boring: use the max.diameter possibleØ 40 cm !L: 3.5 m

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studied for ~ 20 tubes ø50mm (20160 fibers maximum)

gallery side

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Pit side

Gallery side

very difficult jobforeseen for ~1-2 weekstook ~ 1 month !

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New cable trays in the existing gallery(old pictures before install them)

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Preparation for the passage below the new buildingin SX8

Gallery

done last week

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Window for Optical fibersTo pass through the underground level to go to a new ‘parking’ gallery Existing ‘caniveau’ where prototype

installedto the SG8

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90% of “mechanical supports” already installed for the full quantity

In UX85 Velo-RICH1 region: a small platform will come in ~1 month

to be done for 100%:- new gallery (parking) - cable trays installation (new building+parking)- Calo C side cable tray- Velo side: detail integration for cable tray &

installation

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blowing prototype status:

- Tube ø 50mm + 7 microtubes ø12mm installed- Blowing pre-test done with a cheaper cable successful, allowed optimize

machine adjustments (05 Sept 2014)

- Blowing + splicing cable prototype done (29 Sept 2014)

Laurent RoyIn PM85 pit

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lot of people needed to pull the tube2 full days: 8 people

length 500m

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End point of the prototype:SG8

Passage between gallery and the pit

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blowing machine (test cable)Test the maximum speed possible without damaging the cable (in case it blocks).

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Pressure adjustment for the rollers speed

Pressure adjustment for the air blown in the tube

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blowing machine (prototype cable)-film

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speed beginning:~ 60 m/min end: ~ 20 m/min Total ~10 min for the 350m (but preparation takes more time)

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Splicing preparation

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Inside the cable 6 ‘mini cables’ x24 fibers (=24 colors)

Splicing cassette finished12 LC (will be 1 MPO in the future)

1,5 days 2 people to do the 144 splicings + measurements15 000 fibers could take 156 day (2 people) more than half a year !!

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Splicing machine

2 electrical electrodes

-film

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144 fibers Ready for tests with electronics boards !

Front (in SG8)

Back Start point underground in the M1 bunker rack

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preconnectorized prototype status:

- Draka and Fibernet (cheaper) trunk cables each 144 fibers received

should be installed when access possible: CV maintenance (week 48-49-50)

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End of November

LHC planning

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Quantities need for LHCb Upgrade (last estimate from Ken):

Final quantity per sub-detector ?Space for patch panels to foresee -> which location ?

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Is it the right configuration for your sub-detector ? (patch panel, type of patch cord…)

What will be the different lengths ?

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Complete link between the electronic and the patch panels downstairs

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Complete link between the DAQ and the patch panels upstairs

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Which DAQ PCIe40 quantity per sub detector ? Which detector will do a load balancing ?

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Conclusion:

- supports ready for ~ 90 % of the total length (10 % missing to install during Technical Stops)

- Yes it is possible to blow cables in our configuration from down to top

- blowing prototype 144 fibers (UX85-SG8) installed and ready for tests

- 2 trunk version cables received, will be installed in Nov 2 methods will then be compared in details

To progress for the full installation:Need the different lengths of patch cords, quantity of PP on the link, location…- realize ‘worst case’ tests- reserve space (surface & underground)- prepare to order the equipment needed

(optical+PCIe40+’online’+…) - make installation planning information from sub-detectors requested in the next weeks

Laurent Roy