M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 The ANTARES Connection Marco Circella --- INFN Bari 1.

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Presentation transcript:

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 The ANTARES Connection Marco Circella --- INFN Bari 1

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 La Seyne sur Mer The ANTARES site 2 ~40 km ~2475 m depth

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 © F. Montanet 12 lines 25 storeys / line 3 PMTs / storey ~900 PMTs ~70 m 100 m 350 m 14.5 m Submarine links Junction Box cable to shore Anchor/line socket a storey 2500m depth 3 The ANTARES apparatus

M. Circella – ANTARES connectionINFN Comm. II, 5/6/ Hydrophone RX Local Control Module (in the Ti-cylinder) Optical Beacon for timing calibration (blue LEDs) 1/4 floors 17” glass sphere 10” PMT Ham. R stages Basic detector element: storey

M. Circella – ANTARES connectionINFN Comm. II, 5/6/ Architecture of the Data Acquisition System 100 Mb/s link SCM MLCM 2 MLCM 3MLCM 4MLCM 5 1 Gb/s link MUXMUX deMUXdeMUX to shore (MEOC) JB Line 1 Line 2 LCM OM Shore Station La Seyne-sur-mer Demux/ Mux Computer farm LCM MLCM 1 ANTARES: a large undersea LAN…

M. Circella – ANTARES connectionINFN Comm. II, 5/6/ Clock distribution STARTSTOP TDC STARTSTOP GPS E/O/E TX RX Main Electro-Optical Cable 40 km from shore to Junction Box Single bidirectional fibre (1534 nm / 1549 nm) Junction Box 1  16 passive splitter String Control Module BIDI modules O/E and E/O converters by sectors (5 storeys) Local Control Modules LCM clock boards 1534 nm  1549 nm 1310 nm  1550 nm On-shore Station Link Cables m fibre 1534 nm  1549 nm

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 Junction box 7  Receives ~ 3700V 50Hz from shore station & provides 50Hz to 16 galvanically independent outputs {transformer with 16 secondaries} (& individually protected by re-armable circuit breakers);  Distributes clock synchronisation signals on fibreoptics to up to 16 outputs  Collects DAQ data via fibreoptics from up to 16 outputs  Junction Box internal control system and DAQ triply-redundant Deployment, December 2002

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 Cable characteristics: 2 electrical wires: Voltage : 500 VAC, Current : ~2.5 A, wire section : 3 mm 2 2 single mode optical fibres for slow control and data transmission (used with 200 GHz DWDM) 2 single mode optical fibres for clock distribution (1 fibre for redundancy) Optical losses < 2 dB per optical channel Length of the link : 120 m to 350 m Weight of the link : < 50 kg in water Dry cable for link, equipressure for jumper The underwater interlink connections 8

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 lines installed on the sea-bed from a DP-ship underwater interlink cables deployed on drums connection of interlink cables to junction box and lines performed by a manned or unmanned (ROV) underwater vehicle lines can be recovered in case of need by activating an acoustic release system ANTARES construction operations 9

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 L11 L9 L10 L12 L7 L8 L6 L4 L2 L3 L5 L1 IL m N Junction box Submarine cable to shore Status of ANTARES in Dec To be deployed and connected Installed & connected

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 After December 2007 connection operation: 10 detection lines + instr. line connected Junction Box status in early (At least) two connectors bad Implemented solution: two lines of the apparatus share the same JB connector! (required: modified cables, modified lines for DWDM and power) L3 L4 L6 L8 Spare L1 L10 L2 L9 L7 IL L5

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 Line deployment 12 Line being loaded on the ship Ready for deployment Action! Lines are installed within a few meters from nominal positions

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 IFREMER ‘VICTOR6000’ Remotely Operated Vehicle (ROV) Line connection 13

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 Remote tests of the underwater connections (OTDR) 14

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 New ‘Y-cables’ used for multiplexing two lines on one single junction box output May 2008 connection operation 15

M. Circella – ANTARES connectionINFN Comm. II, 5/6/ 'Y-cables' deployed and connected to the Junction Box Line 9 + Line 11 connected with a 'Y-cable' Line 10 connected with second 'Y-cable' Line 12 connected with standard cable interlink cable to Line 4 changed (line functionality recovered!) attempt to repair JB connector 9 seismograph (connected to Line 12) installed 1 bad interlink cable recovered Operations performed in May 2008 (23-25 and 28-30) detection lines + instrumentation line in data acquisition since end-May!

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 Junction Box status in June L3 L10 L6 L8 L9/ L11 L1 L12 L2 L4 L7 IL L5

M. Circella – ANTARES connectionINFN Comm. II, 5/6/2008 L11 L9 L10 L12 L7 L8 L6 L4 L2 L3 L5 L1 IL07 seismometer 100 m N Junction box Submarine cable to shore Status of ANTARES in June Installed & connected! + Possibility of connecting a secondary junction box for multidisciplinary activities (IFREMER project)