1. Calibration Unit (on behalf of Miles Lindsey Clark)
14/02/2017, APC,FR

2. Calibration base mechanics
LBL emitter
Hydrophone
Weight in air : 1,3 tons
Weight in seawater : 890kg
Rotating Lifting mast
Under development by
D.Cobas (APC)
March 2017: design review prior to
fabrication
Laser
Beacon
-Revue des plans mécaniques prevue le mois prochain pour lancer la fabrication des pièces

3. Cable to last DU
Cable to
Instrumentation Unit

4. No major modification since last meeting
Pas de modification majeure depuis le dernier collab meeting; some modifications requested in the design of the new FMC and power cards

5. FMC modifications 7 RS232 ports (EDFAS(x2):AC/DC:LB(x2):LBL:BP S)
1 [RS422] converter (for the IU)
All lines galvanically isolated
Switch for the Hydrophone
Under development by
G.Pellegrini
En cours

6. BPS modifications
Add 12V dedicated power lines to power the LBL and the IU independently
Add a 5V powerline for the LB
Add independent switches to these lines
Upgrade DC/DC chip from 50W to 100W
Dedicated 5V DC lines to the EDFAs
Under developement by R.Cocimano
En cours

7. Laser Beacon (under fabrication By R. Masullo)
Carte LPMI+ en fabrication
(under fabrication
By R. Masullo)

8. Laser Beacon mechanics
Titanium frame; qualification campaign foreseen in hyperbaric chamber
En titane
Lancement en fabrication une fois le choix de nouveaux connecteur fiables défini
Campagne de qualification en caisson hyperbar prévue

10. Laser reach & quartz rod dimensioning
reach of light: 200m
(estimated from IFIC note on
ANTARES Laser Beacon)
150m: maximal distance to
Illuminate 10 DOMs on a DU
T-shaped quartz rod:
ZEMAX simulation ongoing
Simulation sous ZMAX en cours

11. Status of the IU at CPPM Instrumental line : Present In CPPM :
2 IMM (inductive modem)
1 UIMM (inductive interface for non inductive instrument)
3 Aquadopp currentmeters (non inductive)
(need to be adressed via extra interface (UIMM))
1 SeaBird inductive CTD
2 SeaBird non inductive CTD
(to be upgraded with inductive option)
One 300m inductive câble
KM3Net meeting, Strasbourg,26-28 September 2016, Pascale Keller, Alain Cosquer CPPM

12. Status on the IU at CPPM Status development In CPPM :
Experimental inductive testbench operational in CPPM
 Inductive modem control is operational
 Communication with instruments via inductive modem is operational
 Test to choose serial link (CB/IU) protocol is finished :
CLB communicates with RS232
IMM communicates with RS232
=> conversion RS232/422 to assure the data transfert over the 50m interlink cable
(tested on one equivalent 50m cable lent by DT INSU)
 Mechanics design is going on : (see next slides)
KM3Net meeting, Strasbourg,26-28 September 2016, Pascale Keller, Alain Cosquer CPPM

13. General view : preliminary design
Essential elements of subsystem line :
buoy , instruments (devices), anchor
(design in progress).
Deployment and recovery every 2
years with optimal safety
Wire rope + shackle
Sling with four legs
Connexion/deconnexion tools
Survey tools
Titanium frame
Titanium base container
Release system
Deadweight UPE 200 X80
(steel)

14. Preliminary design, global dimensions :
1000 mm
1400 mm
1700 mm
Design of titanium frame currently under going
Design of electronics container under going
Procedures of deployment and recovery of the French site IU
have been studied

15. Calibration Unit TDR in preparation:
KM3NeT_CALIB_WD_2017_001-TDR_CalibrationUnit_v1.docx
on Google Drive
December 2016: Workshop on KM3NeT
and associated Institut de Physique
du Globe de Paris (IPGP)
real-time monitoring of marie environment & instrumentation
for geophysics: the legacy of ANTARES & NEMO, plans for KM3NeT
first contacts & disussions with IPGP, possible
collaborations (interest in hydrophone networks
for seismic studies)

16. BACKUP

17. Instrumented line requirements
Essential elements of subsystem line : buoy , instruments (devices), anchor (design in progress).
Deployment and recovery each 2 years with optimal safety
Anchor functions :
Deadweight (in steel materials) for anchorage (it is possible to add additionnal mass)
The titanium frame integrate :
the release system
the connexion/deconnexion tools for the junction to the CB at the IU
a survey and cleaning port
a titanium base container ‘IB’
A sling with four legs to connect to the instrumented cable
Compacity of anchor (link between the deadweight and titanium frame) during recovery and deployment phasis.
KM3Net meeting, Strasbourg,26-28 September 2016, Pascale Keller, Alain Cosquer CPPM

18. Laser Beacon Specs Laser TEEM Photonics model STG-03E-140
532 nm (green)
(from IFIC Note on
ANTARES Laser Beacon)
Conservative estimate of the maximum
Detection distance: 200m ?

19. Constraints on the emission angle: ORCA
40m + (17x9m)
=190m
θmin = 6°
θmax = 78°
40m to first floor CB
Maximum detection distance: 200m
dmax= 150m: max distance
to illuminate 10 DOMs
dmin = 20m