Participating Institutes
Steering Committee
Meetings
- Catania: kick-off meeting
(March 10th, 2008) - Paris
(February 26th, 2009) - Athens Demokritos
(March 31st, 2009)
News
- Phone meeting
(March 11th, 2010)
Previous working experience
Introduction
In the framework of KM3NeT project (an European project funded under the FP6) devoted to the study of a future "Neutrino Telescope" to be located deep underwater in the Mediterranean sea, we are considering the technical solutions for the connection to the on-shore laboratory of the off-shore detector. The detector will be located in a deep-sea site (3 possible locations can be indicated here at 2500m, 3500m or 5000m depths) at a distance from the shore that can range between 50km and 100km. The connection, between the underwater equipment and the on-shore laboratory, should be able to provide power to the detector and to transmit data/control on optical fibres. The KM3NeT Consortium is considering several options for the detector layout. The number of fibres and the amount of power that the cable should carry vary according to the different detector layouts that we are envisaging. No one of the indicated cable configurations requires off-shore optical amplification.
Technical Characteristics
| A | B | |
| Length [km]1 | 50 or 100 | 50 or 100 |
| Type of power to be transmitted | DC, one polarity + sea return | DC, one polarity + sea return |
| Maximum Power load [kW] | 100 | 50 |
| Maximum Voltage [kV] | 10 | 10 |
| Maximum Current [A] | 10 | 10 |
| Power Transmission efficiency | 95% | 95% |
| Cable resistance [Ω/km] | 1 | 1 |
| Number of fibres2 | 1003 | 24 |
1for each cable configuration we would like to have an estimate of feasibility for both indicated length
2for each solution we would like to know about the possibility to use the following kind of G655 fibres: MFD fibres, LEAF fibres, NZDSF.
3we would like to know about the possibility to use fibres organized in ribbons.
Cost evaluation
In order to estimate the total cost of the connection between the undersea detector and the on-shore laboratory, we need to evaluate of all costs related to the different phases of cable production, transport, deployment, connection and deep-sea operations.
| A | B | |
| Double Armoured cable [k€/km] | ||
| Single Armoured cable [k€/km] | ||
| Light Weight cable [k€/km] | ||
| Joint box DA-SA [k€/km] | ||
| Joint box SA-LW [k€/km] | ||
| Joint box DA-DA [k€/km] | ||
| Joint box SA-SA [k€/km] | ||
| Joint box LW-LW [k€/km] | ||
| Transport cost (100 km cable to a Mediterranean port like : Marseille (France), Catania (Italy), Kalamata, (Greece) | ||
| Deployment cost (100 km cable in one of the three above mentioned sites) | ||
| Time needed for a Joint insertion during a cable repair operation (not including the fault search and the cable recovery) | ||
| In case of a non standard Universal Joint would be needed, the cost of specialized personnel for Joint insertion during a cable repair operation (cost/personnel and number of units) |
Manufacturer List
- ALCATEL Submarine Network
Centre de Villarceaux, Nozay
91625 La Ville du Bois Cedex
France - JDR CABLE System Limited
Littleport Innovation Park
Wisbech Road
Littleport, Ely
Cambridgeshire
CB6 1RA England - Lighthouse R & D Enterprises, Inc.
16945 Northchase Drive, Suite 100
Houston, Texas
77060 USA - Nexans Italia
Via del Crocifisso, 18
04010 Borgo Piave, Latina
Italy - NORDDEUTSCHE Seekabelwerke GmbH
P.O. Box 14 64
26944 Nordenham
Germany - South Bay Cable Corporation
PO Box 67
Idyllwild, CA
92549-0067 USA - Tyco Telecommunications
5th Floor
30-34 Moorgat
East London,
EC2R 6PJ United Kingdom