1. Write-up and Definitions for Cost Model
Two designs

2. Write Up :
Two Designs
Preliminary, V3.4 14/10/2008

3. Two designs Improved Antares String Design Cabled Design
3 OM/storey
1 PMT/OM
Cabled Design
1 OM/storey
31 PMT/OM
Both: fibers in vertical cable

4. Definitions Detection Unit (DU) (total 600m, 500m instrumented)
Detection Unit Infrastructure
Storeys (20, 25m distance)
Detection Unit Infrastructure (DUI)
Cable (flexible)
Buoy
Anchor (concrete slab ~ 1m3)
String Master Module
Storey
Storey Infrastructure (StI)
OMs

5. Detection Unit Infrastructure
4. Anchor
1. Buoy 3.
StMM
Cable breakout box with dry-mateable connector
3. Master Module with dry-mateable connectors
5. Interlink cable with dry- and/or wet-mateable connector
Detection Unit Infrastructure
Buoy
Vertical cable(s) with
electrical/optical/mechanical functions
breakouts at each storey
String Master Module (StMM)
Anchor
Optical/electrical interface to junction boxes
2. Flexible vertical cable

6. Detection Unit Infrastructure
4. Anchor
1. Buoy
3. StMM
Cable breakout box with dry-mateable connector
3. Master Module with dry-mateable connectors
5. Interlink cable with dry- and/or wet-mateable connector
Detection Unit Infrastructure
Buoy
Vertical cable(s) with
electrical/optical/mechanical functions
breakouts at each storey
String Master Module (StMM)
Anchor
Optical/electrical interface to junction boxes
2. Flexible vertical cable

7. Cable in Improved Antares String Design
Improved EOM cable of Antares
Electrical/Optical/Mechanical function in one cable
Built of sections between storeys and between anchor and storey
20 break-out boxes (one at each storey)

8. Cable in Cabled Design Electrical/optical functions
Oil-filled hose at ‘equi-pressure’
20 fibres (one for each storey)
At least one pair of copper conductor
20 break-out boxes with a dry-mateable connector
Mechanical function
Two ropes along side hose
Ropes connected at regular intervals (to provide torque)

9. String Master Module in Improved Antares String Design
Contained in vessel at the base of the DU, possibly glass sphere
Interlink cable between StMM and junction box
Wet-mateable connector at the JB side

10. String Master Module in Cabled Design
Vessel with DWDM multiplexer
Just below lowest storey
Interlink cable between StMM and junction box
1 or 2 fibre
2 copper conductor
Wet-mateable connectorat JB side

11. Storey In both designs compact storeys Improved Antares String Design
3 OMs per storey
interconnected
Cabled Design
1 OM per storey

12. Storey Infrastructure
2. Mechanical interface to Detection Unit Interface
5. Optical/electrical interface between Storey electronics and vertical cable with dry-mateable connectors
Storey Infrastructure
mechanical infrastructure to suspend the optical module(s) (OMs)
mechanical interface to the Detection Unit Infrastructure (DUI)
Storey electronics
Optical/electrical interface between Storey electronics and PMTs
optical/electrical interface between Storey electronics and the vertical cable.
1. Mechanical suspension of OMs
4. optical/electrical interface between Storey electronics and OM(s) using dry-mateable connectors
3. Storey electronics

13. StI in Improved Antares String Design
2. Mechanical interface to Detection Unit Interface
Storey Infrastructure (StI)
mechanical infrastructure to suspend the optical module(s) (OMs)
mechanical interface to the Detection Unit Infrastructure (DUI)
Storey electronics
Optical/electrical interface between Storey electronics and PMTs
optical/electrical interface between Storey electronics and the vertical cable
Water resistant Al alloy
1. Mechanical suspension of OMs
Mechanical structure under study

14. StI in Improved Antares String Design
Storey Infrastructure (StI)
mechanical infrastructure to suspend the optical module(s) (OMs)
mechanical interface to the Detection Unit Infrastructure (DUI)
Storey electronics
Optical/electrical interface between Storey electronics and PMTs
optical/electrical interface between Storey electronics and the vertical cable.
3. Storey electronics
4. optical/electrical interface between Storey electronics and PMTs using dry-mateable connectors
5. Optical/electrical interface between Storey electronics and vertical cable with dry-mateable connectors

15. StI in Improved Antares String Design
Storey Infrastructure (StI)
mechanical infrastructure to suspend the optical module(s) (OMs)
mechanical interface to the Detection Unit Infrastructure (DUI)
Storey electronics
Optical/electrical interface between Storey electronics and PMTs
optical/electrical interface between Storey electronics and the vertical cable.

16. StI in Cabled Design Storey Infrastructure
mechanical infrastructure to suspend the optical module(s) (OMs)
mechanical interface to the Detection Unit Infrastructure (DUI)
Storey electronics
Optical/electrical interface between Storey electronics and PMTs
optical/electrical interface between Storey electronics and the vertical cable.
1. Mechanical suspension of OMs
1. Mechanical suspension of OMs
2. Mechanical interface to Detection Unit Interface

17. StI in Cabled Design Storey Infrastructure
5. Optical/electrical interface between Storey electronics and vertical cable with dry-mateable connectors
Storey Infrastructure
mechanical infrastructure to suspend the optical module(s) (OMs)
mechanical interface to the Detection Unit Infrastructure (DUI)
Storey electronics
Optical/electrical interface between Storey electronics and PMTs
optical/electrical interface between Storey electronics and the vertical cable.
3. Storey electronics
4. optical/electrical interface between Storey electronics and PMTs

18. StI for Cabled Design Storey Infrastructure
mechanical infrastructure to suspend the optical module(s) (OMs)
mechanical interface to the Detection Unit Infrastructure (DUI)
Storey electronics
Optical/electrical interface between Storey electronics and PMTs
optical/electrical interface between Storey electronics and the vertical cable.

19. Storey Infrastructure
4. optical/electrical interface between Storey electronics and PMTs
1. Mechanical suspension of OMs
Storey Infrastructure
mechanical infrastructure to suspend the optical module(s) (OMs)
mechanical interface to the Detection Unit Infrastructure (DUI)
Storey electronics
Optical/electrical interface between Storey electronics and OM(s) and IM(s)
optical/electrical interface between Storey electronics and the vertical cable.
2. Mechanical interface to Detection Unit Interface
5. Optical/electrical interface between Storey electronics

20. OM in Antares Improved String Design
5. Optical interface
3. PMT base
2. PMT
4. Communication Concentrator
6. Cooling
1. Glass sphere
Optical Module
Glass sphere vessel of 17”
PMT(s)
PMT bases
Communication Concentrator
Optical interface
Cooling

21. OM in Cabled Design Optical Module 1. Glass sphere 6. Cooling
5. Optical interface
3. PMT base
2. PMT
4. Communication Concentrator
6. Cooling
1. Glass sphere
Optical Module
Glass sphere vessel of 17”
PMT(s)
PMT bases
Communication Concentrator
Optical interface
Cooling

22. OM in Improved Antares String Design
17” glass sphere, possibly 13”
10” PMT, 45o looking down
Choice PMT under study
Q.E. PMT 32%
Optical gel ~ 2-6 cm

23. OM in Cabled Design 17” glass sphere
31 x 3” PMTs (19 in lower half, 12 in upper)
Front face following sphere radius
Q.E. PMT 42%
TTS PMT 1 ns (RMS)
~ 2 mm thick optical gel-pads per PMT

24. Readout and Trigger in Improved Antares String Design
Readout similar to Antares readout
Trigger
L0: threshold value 0.3 spe
L1-a: 2 x L0 within 20 ns at the same storey
L1-b: threshold value 3 spe in one OM

25. Readout and Trigger in Cabled Design
Fibre optics
Both synchronous and asynchronous data transfer possible
Trigger
L0: threshold value 0.3 spe
L1-a: 2 x L0 in adjacent PMTs in the same OM within 10 ns

26. Additional Instrumentation
Both designs foresee additional instrumentation inside the OM
Compass, tilt meter
Acoustic sensor
LED
Under study

27. Proposal Agree on definitions (PCC?)
Implement definitions in Excel file for cost model
Agree on criteria for assessment:
Physics/Euro, what do we mean?