Optical Fibers / Electronics Upgrade Fibers need for Upgrade -> Installation ?

1. 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

2. ‘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: 65m space in cable tray~2cm2/cable Need for Upgrade: Multimode - 50/125μm - OM3 or OM4 - λ= 850nm -144 fibers? (12 x12) / 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: ~ 300m (Rk: 2 options still open for ‘Tell40’ position) Laurent Roy

3. 2 possibilities for multi fibers installation • 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 Laurent Roy

4. 2 possibilities for multi fibers installation • 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 Laurent Roy

5. 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  Laurent Roy

6. New server Rooms New LHCb Control Room PX85 shaft PM85 shaft PZ85 shaft Total length ~ same through the 3 pits. (PM85 ~+10-20m/PZ85) Max 300m. D3 Barack: actual Front End Boards location Daniel Lacarrere scheme Laurent Roy

7. 3 pitsat Point 8 a) b) • 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… Laurent Roy

8. DAQ Option 3 short links (10Gb Ethernet) long links (10Gb Ethernet) Tell40 Option 2 Patch Panel Pit 100m PZ85 PM85 ~ 200m length Option4= Option 2 + Option 3 together ? ~ 300m total length Cable chain Option 1 ~ 100m total length cables Patch cord Tell40 long distance cable Patch Panel Electronic Boards Patch Panel Detector UX85 Detector side UX85 Protected area Shielding Wall Laurent Roy

9. installation responsibilities : Cern Team: long distance fibers, Racks, Patch panels Sub-detectors: Patch cords Sub-detectors: Patch cords (scheme from Rainer ) Laurent Roy

10. Quantities / Patch Panels total based on the worst case scenario of sub-detector choices (Ken-end of April) Laurent Roy

11. MUON A2 ? MUON A • 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 ? CALO A Futur CALO C MUON C MUON C2 ? Laurent Roy

12. Balcony PP: Velo TT RICH1 • 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) A side Bunker PP: MUON1 RICH2 IT OT C side New racks for Optical connections Laurent Roy

13. Space available: Cryo platform - Behind Magnet C side - near Muon and Calorimeter racks Laurent Roy

14. 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’ 2016-2018 • Racks, Patch panel and fibers installation, tests. • First days of LS2: Long distance fibers ready. Laurent Roy

15. 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 takeensoon 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 Laurent Roy