LHCb Upgrade Optical Fibers from Cavern to the

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 10 th October 2014

- LS 2 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 UX 85 to Surface ready for beginning of LS 2 2013 Study passages through the 2 pits available PM 85 pit chosen Disadvantages ü Pass thought an LHC side (US 85, PM 85): - agreement of LHC (space taken, integration in 3 D 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 ü in a ‘technical area’ (no need special derogation/safety exit) ü no passage through the LHCb shielding wall (difficult before LS 2) ü no space take in the existing ‘LHCb’ cable trays (probably happy to have for LS 2) Laurent Roy

New Power Transformer ? SG 8 HV cells End point: New server Rooms passage for the prototypes New LHCb Control Room PM 85 shaft PX 85 shaft PZ 85 shaft Start point: ~3 areas in UX 85 Laurent Roy

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 Solution compatible for both types found for the supports: rails + clamps bundle of 7 trunk cables (for pre-connectorized) 50 mm tube (for blowing in 7 mini tubes) Laurent Roy

Supports installation: has been designed directly for the full quantity - 600 mm standard cable trays installed in UX 85 -C (Cryo part) Laurent Roy

cable trays installed in UX 85 -C (Cryo part) -Try to minimize the curves but cannot avoid few of them However minimum bending radius (76 cm) respected everywhere Laurent Roy

Large scaffoldings mounted -for new cable trays on the wall /US 85 -for passages through the ‘siporex’ wall Laurent Roy

Scaffolding above Cryo racks 2 holes drilled in UX 85 -US 85 wall -for fibers coming from Bunker+Calo+Muon fibers -for Velo side (Velo, UT, Rich 1) New cable tray Laurent Roy

New cable tray for Muon+Calo Laurent Roy

2 nd hole new supports in US 85 closing before LHC powering tests safety / leak of He Laurent Roy

Difficult passage (between large air duct and the wall) ‘en drapeau’ Special support to move ducts away from power cables (with a safe distance of 25 cm requested) Laurent Roy

Scaffolding bottom PM 85 + Cryo cold box protection Laurent Roy

2 Cryo exhausts moved away (bottom of the pit) limited space allowed by Cryo and LHC integration in PM 85 Laurent Roy

Special support for ~85 m vertical part in the pit mechanical characteristics report provided rails on each sides Laurent Roy

Mechanical supports studied to occupy the maximum of space available between 2 ‘cryo transfer lines’ 20 tubes ø 50 mm could be installed x 7 = 140 cables x 144 fibers =20160 fibers is the maximum that should be possible to install Laurent Roy

junction between pit and gallery at the surface Boring ~ 3. 5 m of concrete + rubble to reduce length: -30 m boring: use the max. diameter possible Ø 40 cm ! L: 3. 5 m Laurent Roy

gallery side studied for ~ 20 tubes ø 50 mm (20160 fibers maximum) Laurent Roy

Pit side very difficult job foreseen for ~1 -2 weeks took ~ 1 month ! Gallery side Laurent Roy

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

Preparation for the passage below the new building in SX 8 done last week Gallery Laurent Roy

Window for Optical fibers To pass through the underground level to go to a new ‘parking’ gallery Existing ‘caniveau’ where prototype installed to the SG 8 Laurent Roy

90% of “mechanical supports” already installed for the full quantity In UX 85 Velo-RICH 1 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 Laurent Roy

blowing prototype status: - Tube ø 50 mm + 7 microtubes ø 12 mm 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) In PM 85 pit Laurent Roy

length 500 m lot of people needed to pull the tube 2 full days: 8 people Laurent Roy

Passage between gallery and the pit End point of the prototype: SG 8 Laurent Roy

blowing machine (test cable) Test the maximum speed possible without damaging the cable (in case it blocks). Pressure adjustment for the air blown in the tube Pressure adjustment for the rollers speed Laurent Roy

blowing machine (prototype cable) -film speed beginning: ~ 60 m/min end: ~ 20 m/min Total ~10 min for the 350 m (but preparation takes more time) Laurent Roy

Splicing preparation Inside the cable 6 ‘mini cables’ x 24 fibers (=24 colors) Splicing cassette finished 12 LC (will be 1 MPO in the future) 1, 5 days 2 people to do the 144 splicings + measurements 15 000 fibers could take 156 day (2 people) more than half a year !! Laurent Roy

Splicing machine 2 electrical electrodes -film Laurent Roy

144 fibers Ready for tests with electronics boards ! Front (in SG 8) Back Start point underground in the M 1 bunker rack Laurent Roy

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) LHC planning End of November Laurent Roy

Quantities need for LHCb Upgrade (last estimate from Ken): Final quantity per sub-detector ? Space for patch panels to foresee -> which location ? Laurent Roy

Complete link between the electronic and the patch panels downstairs Is it the right configuration for your sub-detector ? What will be the different lengths ? (patch panel, type of patch cord…) Laurent Roy

Complete link between the DAQ and the patch panels upstairs Which DAQ PCIe 40 quantity per sub detector ? Which detector will do a load balancing ? Laurent Roy

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 (UX 85 -SG 8) 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+PCIe 40+’online’+…) - make installation planning information from sub-detectors requested in the next weeks Laurent Roy