Site for the PPM-DU String Layout Possible Site / Properties Power / Communication Contribution / Planning R.Papaleo, P.Lamare, E.Heine Bologna

Objectives of PPM-DU Verification DOM in the network Verification of the DU design Verification of deployment with the LOM

PPM-DU layout 3 active DOM’s (place?) <= 17 dummy DOMs, <=5 buoyant spheres OFM functionality in foot container Possibly voltage conversion in foot container Properties; Top drift <= m/s sea current Weight in air <= 1700 kg DOM interval <= 40 m Leader <= 120 m Height in sea <= 876 m Rope Ø = 4 mm, ρ = 970 kg/m 3, load <= 210 kg/rope VEOC Ø = 6.35 mm, ρ = 1168 kg/m 3 DOM Ø = 432 mm, ρ = 720 kg/m 3 Buoy Ø = 432 mm,ρ = 410 kg/m 3 Deadweight ≈ 946 kg in air (iron) Volume ≈ ½ x 20 foot ISO container Constrains; 2 dedicated fibres to shore V=, 40 W from foot container

Possible sites InfrastructureLocation Shore distance (km) Depth (m) Number of output available Type of connector Voltage (V) Number of fibre per output Fibre type Antares 42 o 48 N 6 o 10 E ? ODI rolling seal 500VAC2ITU-G654 Capo Passero 36 o 17,06’N 15 o 58,9’E ODI NRH375 DC2 | 3ITU-G655 Infrastructure Acoustic positioning ADCPCTDC-starCTLaser beacon AntaresOperational22222 Capo Passero To be deployed Instrumentation (partly on Nemo tower / Antares instrumentation line) Geographic and installed properties

Connection diagram Shore station Base container DOM #1 DOM #2 DOM #3 ? P SC O MEOC IL ? VEOC ? Depends on site; P AC/DC conversion for Antares IL Antares: spare part wm-connectors both sides IL Capo Passero: to order wm-connector JB side or both sides data sc + cw GPS JB P available covered open Anchor DAQ PPM-DU ? depends on site

Shore station 50/50 APD VOA on/off λ5 C2 λ1 C2 λ1-3 Concept for PPM-DU with Overlay DWDM REAM 2xCu DOM PIN λ1 λ5 C-Band nm MOD + Drivers LiNbO3 45 / 95 km Gbps CW + SC / Tim Base container optics Junction Box REAM 2xCu DOM PIN λ2 λ5 REAM 2xCu DOM PIN λ3 λ5 Control box λ4 Electronics DAQ

Concept of the power flow Client voltages from control to control to optics Vac IL VEOC <= 40 W Base container power Antares Storey Vdc 12Vdc Client voltages DOM BOB Fuse 0.5A-10ms,OCP 3Apeak Storey Vdc 12Vdc Client voltages DOM Storey Vdc 12Vdc Client voltages DOM Vdc BOB JB

Contributions Itemavailablecoveredopen GPSINFN/CPPM Shore DAQ / softwareDemokratos? Shore electronics??? Shore opticsNikhef Shore powerCPPM/INFN MEOCCPPM/INFN JBINFN/CPPM ILCPPMINFN Foot container mechanicsINFN/CPPM power conversionCPPM local powerCPPM power switchINFN /CPPM controlINFN/CPPM opticsNikhef AnchorNIOZ/INFN/CPPM? DU infraNIOZ, Nikhef Buoy spheresNIOZ Dummy spheresNIOZ RopeNikhef, NIOZ VEOCNikhef DOM 1,2Nikhef DOM 3 ECAP Power boardDemokratos (TBD) CLBIFIC (TBD) Software/firmware??? OctopusNikhef HV-baseNikhef PMTNikhef,CPPM,ECAP,INFN VEOC DC/DCNikhef DeploymentNIOZ ROV ConnectionCPPM/INFN Shore Network infra DU-string Sea operations

Site dependencies AntaresCapo Passero 2500 mdepth3450 m 45 kmdistance95 km No (now) Available JB output Yes IL (spare)physical DU connectionIL (15 wks) AC/DC (? wks)power connectionDC Base containercommunicationBase container DAQshoreDAQ Sea operationsinstallationSea operations Apache / COMEXconnectionCougar / Certamen

Sea operations

Realisation issues Major planning restrictions Complete contribution list DU NIOZ Texel Malaga Spain Deployment tests – PPM-DU deployment – Connection 4M2013 Delivering time IL15 wks Delivering time optics13 wks manpower Mandatory Project coordinator PPM-DU Operation coordinator / site

Summary -Two possible sites are identified: Antares Capo Passero -Arguments are given for a choice: Time schedule Infrastructure available/offered at the sites Technical layout Site choice is URGENT