lhcb upgrade optical fibers from cavern to the surface - what has been done ? - prototypes status...
TRANSCRIPT
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
• 2
- 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
• 3Laurent Roy
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
• 4
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
Laurent Roy
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)
• 5Laurent Roy
- 600mm standard cable trays installed in UX85-C (Cryo part)
Supports installation: has been designed directly for the full quantity
• 6Laurent Roy
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
• 7Laurent Roy
Large scaffoldings mounted-for new cable trays on the wall /US85-for passages through the ‘siporex’ wall
• 8Laurent Roy
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)
• 9Laurent Roy
New cable tray for Muon+Calo
• 10
Laurent Roy
closing before LHC powering tests safety / leak of He
2nd holenew supports in US85
• 11
Laurent Roy
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)
• 12
Laurent Roy
Scaffolding bottom PM85 + Cryo cold box protection
• 13
Laurent Roy
2 Cryo exhausts moved away(bottom of the pit)
limited spaceallowed by Cryo and LHC integrationin PM85
•14
Laurent Roy
Special support for ~85m vertical part in the pit
rails on each sides
mechanical characteristics report provided
• 15
Laurent Roy
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
•16
Laurent Roy
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
• 17
Laurent Roy
studied for ~ 20 tubes ø50mm (20160 fibers maximum)
gallery side
• 18
Laurent Roy
Pit side
Gallery side
very difficult jobforeseen for ~1-2 weekstook ~ 1 month !
•19
Laurent Roy
New cable trays in the existing gallery(old pictures before install them)
• 20
Laurent Roy
Preparation for the passage below the new buildingin SX8
Gallery
done last week
• 21
Laurent Roy
Window for Optical fibersTo pass through the underground level to go to a new ‘parking’ gallery Existing ‘caniveau’ where prototype
installedto the SG8
•22
Laurent Roy
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
• 23
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
• 24
Laurent Roy
lot of people needed to pull the tube2 full days: 8 people
length 500m
• 25
Laurent Roy
End point of the prototype:SG8
Passage between gallery and the pit
• 26
blowing machine (test cable)Test the maximum speed possible without damaging the cable (in case it blocks).
Laurent Roy
Pressure adjustment for the rollers speed
Pressure adjustment for the air blown in the tube
• 27
blowing machine (prototype cable)-film
Laurent Roy
speed beginning:~ 60 m/min end: ~ 20 m/min Total ~10 min for the 350m (but preparation takes more time)
• 28
Splicing preparation
Laurent Roy
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 !!
• 29
Laurent Roy
Splicing machine
2 electrical electrodes
-film
• 30
Laurent Roy
144 fibers Ready for tests with electronics boards !
Front (in SG8)
Back Start point underground in the M1 bunker rack
• 31
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)
Laurent Roy
End of November
LHC planning
• 32
Laurent Roy
Quantities need for LHCb Upgrade (last estimate from Ken):
Final quantity per sub-detector ?Space for patch panels to foresee -> which location ?
•33
Is it the right configuration for your sub-detector ? (patch panel, type of patch cord…)
What will be the different lengths ?
Laurent Roy
Complete link between the electronic and the patch panels downstairs
• 34
Complete link between the DAQ and the patch panels upstairs
Laurent Roy
Which DAQ PCIe40 quantity per sub detector ? Which detector will do a load balancing ?
• 35
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