Speaker
Dr
Mieke Bouwhuis
(NIKHEF)
Description
The KM3NeT neutrino telescope is a next generation Cherenkov array containing thousands of optical modules being installed in deep sea at a depth larger than 2500 m and more than 40 km distance from the shore. For the precise event reconstruction sub-nanosecond precision synchronization between modules is required. Its realization exploits the White Rabbit system to synchronize clocks between nodes through Ethernet over optical fiber. This system was modified for the KM3NeT architecture that is designed for clock distribution based on a common broadcast line. The calibration procedure for electronics latencies, fiber path asymmetries and wavelength dependent light velocity on fiber is described. LED beacons installed on optical modules, laser beacons at the sea bottom and K40 decays are also used to monitor the detector time synchronization in situ.
Application of the time calibration procedure to the first detection unit string with 18 optical modules and it performance will be presented.
| Registration number following "ICRC2015-I/" | 1291 |
|---|---|
| Collaboration | KM3NeT |
Primary author
Dr
Mieke Bouwhuis
(NIKHEF)
Co-authors
Giorgio Riccobene
(INFN)
Konstantinos Manolopoulos
(University of Athens)
