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13 June 2013Laurent Roy
Optical Fibers / Electronics Upgrade
- Fibers need for Upgrade -> Installation ?
- Two techniques possible for multi fibers installation
- Different routing possible from UX to surface (3 pits)
- Responsibilities for material installation
- Patch panels detector side (space)
- Status, Planning
13 June 2013Laurent Roy
Need for Upgrade:
Multimode - 50/125μm - OM3 or OM4 - λ= 850nm -144 fibers? (12 x12) / cable or tubeMPO connectors
Total: ~ 17 000 fibers (Ken table / based on quantities estimated by the sub-detectors)
Total Length between detector and DAQ: ~ 300m (Rk: 2 options still open for ‘Tell40’ position)
‘Long distance’ fibers installed today Trunk cable:Multimode - 50/125 μm - OM2 - λ= 850 nm - 96 fibers cable (8 ribbons of 12) MPO connectors
Total: 87 installed = 8350 fibers - 6 lengths ordered mini: 43m – maxi: 65mspace in cable tray~2cm2/cable
13 June 2013Laurent Roy
2 possibilities for multi fibers installation
1) Optical cable blown through rigid tubes:
• well control by the companies for long distance (1-3 km) in Telecom
• installation could be separated in 3 phases (tubes, fibers, connectors)
• large total section needed (~ 30 tubes diam. 40mm for 17000 fibers)
• bending radius constraining• ‘ technician time ’ for splicing very long - standard splicing (mono fiber): ~17 weeks with 2 technicians - splicing machine for 12 fibers ribbon exist (16000€: Fujikura 70R) but not used a lot by European companies, need fibers organized per ribbon in the cable blown.• need space for ‘splicing cassette’ in both ends
13 June 2013Laurent Roy
2 possibilities for multi fibers installation
2) Cables pre-connectorized with MPO:• connectors mounted, all fibers tested directly in manufacturer
site (good quality assembly, measurements file provided) • total section reduced (120 cables x 144 fibers, diam.
~15mm/cable)
60-70m is the length maxi EN-Cern group already installed• bending radius during the installation to respect to not break
fibers • cable pulled with its extremities where fragile MPO connectors
are• precautions to take increase time to install (need access) in
cable tray• lengths between racks must be measured with precision before
order nevertheless, need space somewhere to ‘absorb’ the surplus.
asfas
13 June 2013Laurent Roy
Preparation: supports installation during LS1 ?
supports for these 2 techniques are not the same.(special supports for tubes / cable ducts for cable pre-connectorized)
Advises + Prices estimate asked to EN/EL-Optical section + to few companies ~ 1 month ago (with Rainer and Niko): UX85+pit visits on going.
- End of offers reception in ~ 1-2 months should help for our choice
PZ85 shaft
New LHCb Control Room
New server Rooms
D3 Barack: actual Front End Boards location
PM85 shaft
PX85 shaft
Laurent Roy 13 June 2013
Total length ~ same through the 3 pits.(PM85 ~+10-20m/PZ85)Max 300m.
Daniel Lacarrere scheme
3 pits at Point 8
Laurent Roy
PX85: rejected (space keep free for ‘big detector’…, cable routing not trivial on the top)
PZ85: need to pass through the shielding wall a) access difficult (on the vault above the detectors)
b) use last space available which we will be happy to have for other additional cables? PM85: no access possible for installation during ‘ Physic program’ , + 10-20m
longer
Rk: Thanks Daniel for his help to explore all possibilities…
13 June 2013
a)
b)
Laurent Roy
Tell40
Patch Panel
Patch cord
long distance cable Patch Panel
Cable chain
Electronic Boards
Detector
cables
UX85 Protected area UX85 Detector sideShielding Wall
~ 300m total length
Tell40
Pit 100m
~ 100m total length
Option 2
Option 3
Patch Panel
PM85PZ85
DAQ
short links (10Gb Ethernet)
13 June 2013
~ 200m length
Option 1
Option4 = Option 2 + Option 3 together ?
long links (10Gb Ethernet)
13 June 2013Laurent Roy
installation responsibilities :
( scheme from Rainer )
Cern Team: long distance fibers, Racks, Patch panels
Sub-detectors:Patch cords
Sub-detectors:Patch cords
13 June 2013Laurent Roy
Quantities / Patch Panels
total based on the worst case scenario of sub-detector choices (Ken-end of April)
13 June 2013Laurent Roy
Additional Patch Panel racks ?
RB86 Side (Calo+Muon)
1 Calorimeter PP - A side (full) add 1 rack C side
1 Muon PP for each side add 1 ‘small’ rack in each side ?
Futur CALO C
MUON A
MUON C2 ?
CALO A
MUON A2 ?
MUON C
13 June 2013Laurent Roy
Additional Patch Panel racks ?
RB84 Side (Velo, RICH1, TT, Bunker)
Velo+TT+Rich1 keep Balcony racks (if PZ85
used) Use ‘velo analogue’ cable trays add 1 rack C side (if PM85 used)
‘Bunker’ racks: +/- full add few racks on Cryo platform
(if PM85 used)
New racksfor Optical connections
Bunker PP:MUON1RICH2ITOT
Balcony PP:VeloTTRICH1
A side
C side
13 June 2013Laurent Roy
Space available:
Cryo platform - Behind Magnet C side - near Muon and Calorimeter racks
13 June 2013Laurent Roy
Planning:
• Sept-Oct 2013: choices done between the different options. • End of 2013: supports integration done in 3D mock-up Need to find Manpower (designer) to integrate the ducts…
• Beginning 2014: offers request for supports installation.
• End of LS1: supports installation done.one optical link prototype (complete chain: transmitter -> Tell40 receiver) installed ?
• 2015: Call for tender (6 months)
• During Technical Stop of LHC ‘Physics program’ 2016-2018Racks, Patch panel and fibers installation, tests.
• First days of LS2: Long distance fibers ready.
13 June 2013Laurent Roy
CONCLUSION
• Choice to do between 2 techniques for fiber installation Choice to do between 4 options for routing (Tell40 on surface or downstairs, PM85 or PZ85) Cost comparative on going
Fibers Tests on going (Rainer slides) • Decisions have to be takeen soon if we want to profit of LS1 to
install supports in PM85 (access limited, even not possible during LHC running period).
• Important to have a good estimate of quantities - end of 2013: to evaluate the space needed, dimension the supports, the patch panel space in UX Racks. - end of 2014: before the call for tender
• Sub detectors, please look at proposal for Patch Panel racks position
