Optical Fibers Electronics Upgrade Fibers need for Upgrade
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 Laurent Roy 13 June 2013
‘Long distance’ fibers installed today Trunk cable: Multimode - 50/125 μm - OM 2 - λ= 850 nm - 96 fibers cable (8 ribbons of 12) MPO connectors Total: 87 installed = 8350 fibers - 6 lengths ordered mini: 43 m – maxi: 65 m space in cable tray~2 cm 2/cable Need for Upgrade: Multimode - 50/125μm - OM 3 or OM 4 - λ= 850 nm -144 fibers? (12 x 12) / cable or tube MPO connectors Total: ~ 17 000 fibers (Ken table / based on quantities estimated by the sub-detectors) Total Length between detector and DAQ: ~ 300 m (Rk: 2 options still open for ‘Tell 40’ position) Laurent Roy 13 June 2013
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. 40 mm for 17000 fibers) bending radius constraining ‘ technician time ’ for splicing very long • need space for ‘splicing cassette’ in both ends - standard splicing (mono fiber): ~17 weeks with 2 technicians - splicing machine for 12 fibers ribbon exist (16000€: Fujikura 70 R) but not used a lot by European companies, need fibers organized per ribbon in the cable blown. Laurent Roy 13 June 2013
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. ~15 mm/cable) 60 -70 m 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 Laurent Roy 13 June 2013
Preparation: supports installation during LS 1 ? 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): UX 85+pit visits on going. - End of offers reception in ~ 1 -2 months should help for our choice Laurent Roy 13 June 2013
New server Rooms New LHCb Control Room PX 85 shaft PZ 85 shaft PM 85 shaft Total length ~ same through the 3 pits. (PM 85 ~+10 -20 m/PZ 85) D 3 Barack: actual Front End Boards location Max 300 m. Laurent Roy Daniel Lacarrere scheme 13 June 2013
3 pits at Point 8 a) b) PX 85: rejected (space keep free for ‘big detector’…, cable routing not trivial on the top) PZ 85: 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? PM 85: no access possible for installation during ‘ Physic program’ , + 10 -20 m longer Rk: Thanks Daniel for his help to explore all possibilities… Laurent Roy 13 June 2013
DAQ Option 3 short links (10 Gb Ethernet) long links (10 Gb Ethernet) Tell 40 Option 2 Patch Panel Pit 100 m PZ 85 ~ 200 m length PM 85 Option 4 = Option 2 + Option 3 together ? ~ 300 m total length Cable chain Option 1 Tell 40 Patch cord ~ 100 m total length long distance cable Patch Panel UX 85 Protected area Laurent Roy cables Patch Panel Electronic Boards Detector Shielding Wall UX 85 Detector side 13 June 2013
installation responsibilities Sub-detectors: Patch cords Laurent Roy : Cern Team: long distance fibers, Racks, Patch panels Sub-detectors: Patch cords ( scheme from Rainer ) 13 June 2013
Quantities / Patch Panels total based on the worst case scenario of sub-detector choices (Ken-end of April) Laurent Roy 13 June 2013
MUON A 2 ? MUON A Additional Patch Panel racks ? CALO A RB 86 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 C 2 ? Laurent Roy 13 June 2013
Additional Patch Panel racks ? RB 84 Side (Velo, RICH 1, TT, Bunker) Balcony PP: Velo TT RICH 1 Velo+TT+Rich 1 keep Balcony racks (if PZ 85 used) Use ‘velo analogue’ cable trays add 1 rack C side (if PM 85 used) A side Bunker PP: MUON 1 RICH 2 IT OT ‘Bunker’ racks: +/- full add few racks on Cryo platform (if PM 85 used) C side New racks for Optical connections Laurent Roy 13 June 2013
Space available: Cryo platform - Behind Magnet C side - near Muon and Calorimeter racks Laurent Roy 13 June 2013
Planning: • Sept-Oct 2013: choices done between the different options. • End of 2013: supports integration done in 3 D mock-up Need to find Manpower (designer) to integrate the ducts… • Beginning 2014: offers request for supports installation. • End of LS 1: supports installation done. one optical link prototype (complete chain: transmitter -> Tell 40 receiver) installed ? • 2015: Call for tender (6 months) • During Technical Stop of LHC ‘Physics program’ 2016 -2018 Racks, Patch panel and fibers installation, tests. • First days of LS 2: Long distance fibers ready. Laurent Roy 13 June 2013
CONCLUSION • Choice to do between 2 techniques for fiber installation Choice to do between 4 options for routing (Tell 40 on surface or downstairs, PM 85 or PZ 85) Cost comparative on going Fibers Tests on going (Rainer slides) • Decisions have to be takeen soon if we want to profit of LS 1 to install supports in PM 85 (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 Laurent Roy 13 June 2013
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