1. Contacts with interested companies Type of contact Firms Highlights

2. Type of contacts Component and design level Farnell, Spoerle, etc.electrical components Seaconconnectors Drakaspecial fibres Small firms to review design on collegial basis Feasibility studies)* study on command (paid for) middle sized firms close consultations from both sides Research / design specific components for KM3NeT Seacon Photonis, ETEL, Hamamatsu )* reports available in print from Nikhef (some confidential)

3. Feasibility studies CIP photonic network concept; realisation of a demonstrator JDR Horizontal and vertical electro optical cable Main electro optical cable PBF 10 kV distribution system 10 kV DC/DC conversion Baas b.v. VEOC assembly possibilities Optronics (Dutch Navy company) Optical behaviour of the glass sphere

4. CIP CIP is a leading supplier of advanced photonic components and services in the communications, life sciences, industrial and defence market places. R-EAM Reflected electro absorption modulator CIP-NIKHEF concepts presented many times and are now the core of the network topology in the TDR. KM3NeT Demonstrator set-up configuration KM3NeT Real-time Opto-electronic Read-out system

5. JDR JDR is a leading provider of custom-designed and manufactured subsea power cables, umbilical systems and marine cables for a broad range of applications. Products Subsea power cables Marine cables Umbilical systems Field: Oil, gas industry Wind farm industry Science (Seismologic research, ICECUBE) Nearby locations: Krimpen a/d Lek – Netherlands Hartlepool - United Kingdom

6. JDR Tree growth in XLPE Due to gas filled voids in the insulation. Main electro-optic cable Cable design and trade offs: Magnetic field Electrical fields Isolation parameters Strength and catenaries calculations Horizontal and vertical electro-optical cable Cable concepts Termination design Deployments

7. JDR cables

8. JDR termination

9. PBF PBF is a worldwide operating company specialised in switched mode power supplies and higher level power solutions. PBF is a fast growing company which is strongly driven by technological innovation. This leads to state of the art design solutions which are beneficial for our customers. Also for this reason companies like Philips, Bosch, Thales, FEI Electron Optics and Coherent made their choice for PBF. Built the SPM (String power module) and LPB (Local Power Box) for Antares Almelo Netherlands, Romania Germany Acal Creteil France Acal Milan Italy

10. PBF For practical reasons they discouraged a +200 (400)-0- -200 (400)V HEOC system. More uniform design (higher reliability) Less wires in cable (volume) 10 kV distribution system(100 kW load) Reliability DC/DC converters Shore system Cable analysis (switch on, arcing, etc) maximum load behaviour

11. PBF shore concepts Concept 1Concept 2Concept 3 Description2 x 80kVA trafo with 12-puls rectifiers 4 x ACDC converters of 40kW in parallel 10 x ACDC converters of 13kW in parallel Input voltage400Vac 3-phase Output voltage +10kV Nom. Output power120kW Installed output power140kW160kW130kW Ripple voltage<10%< 1% Power factor0,90,990,93 Technology DCDC50Hz25kHz100kHz Technology PFC12-pulse rectifierRectifierPBF design Power switchesn.a.IGBT'sMosfets Overload protectionfusesCurrent limit Estimated MTBF >500.000 hrs >1.000.000 hrs >2.000.000 hrs Estimated Lifetime> 50000 hrs Serviceabilityrepair at stationinterchange of unit Down time for service1-7days30 minutes2 minutes Weight per replaceable module n.a.100kg30kg Size2 cabinets 800 x 1000 x 1800 1 cabinet 800 x 1000 x 1800 1 cabinet 600 x 800 x 1800 Weight estimation1200kg550kg450kg Heat removalAir coolingWater coolingAir cooling or water Calculated efficiency97%93%95% Calculated loss3,7kW9kW6,3kW

12. PBF shore system ranking Concept1 2 3Remark Efficiency+++ Design++ All proven design Testability++++In concept 2 and 3 each converter can be tested independently. In concept 3 the power per unit is the smallest, so the most easy to test. Reliability+/ - +++1: lower number of components, more stress per component. 2: More components, but lower stress per component, one converter may fail without loss of functionality. 3: More components, but lower stress per component, one or even two converter may fail without loss of functionality. Heat+++ High efficiency for all concepts, at concept 2 and 3 the heat is more spread out trough the system. Concept 1 and 3 have a very high efficiency Size-++ Sensitivity for components tolerances ++ Price++++ Weight-++ Overload Protections +++ Concept 1: Passive: fuses Concept 2 + 3: Passive and active

13. Cable transients @ switch on / off Cable length = 100km. Input voltage: step of 10kV. Vout @ no load on the cable Vout @ 50uF load on the cable Vout @ 100uF load on the cable

14. PBF 10kV to 400V conversion 3. Multiple power supply system with independent transformers, outputs in series and parallel 1.Multiple power supply system with common transformer 2. Multiple power supply system with independent transformers

15. PBF 10kV to 400 V convertor ranking Concept123Remark Efficiency+++Efficiency probable equal for both designs Design-+-2 = proven design Testability-++ In concept 2and 3 each converter can be tested independently Reliability++++1: lower number of components, but more stress per component 2 and 3: More components, but lower stress per component In concept, failure of a converter does not result in reduced output power Heat+++ High efficiency for all concepts, at concept 2 and 3 the heat is more spread out trough the system Size++ All concept can be build compact <300mmØx1000mm, <100kg without housing. Sensitivity for components tolerances --+ 1: Component tolerances will probably cause high frequency currents in the transformer. 2: Component tolerances will not cause high frequency currents 3: Component tolerances will cause a total runaway of the input voltages of each converter unless each converter is individual controlled, which makes the design very complex Price++++/-2 and 3 has more components that concept 1. Although the components of concept 2 and 3 are less expensive, the total price will probable be higher. The control circuit of concept 3 is much more complex then concept 1 and 2

16. Baas b.v. Outcome partly used to design and built the VEOC II Presented in several presentations about the VEOC. R & D, offering high standard research, development and advice focussed on innovative and practical applications in the field of fibre technology and opto-electronics. Feasibility for a hybride vertical electrical/optical cable

17. Optronics Defence Material Organisation Optimization of KM3NeT Optical Module Optronica is part of the Dutch Defense Materiel Organisation, dedicated to the full life cycle support of optronic instruments of the Netherlands Armed Forces.

18. Conclusion Contacts work both directions: -Learn from industrial company expertise for KM3NeT -What can we expect from industry? -Innovation, future demands from customers to industry Usefull input to be taken very seriously However, we have to make our own decisions