# ICRC2015

July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

## Performances and main results of the KM3NeT prototypes

Jul 30, 2015, 3:30 PM
1h
Amazon Foyer Terrace (World Forum)

### Amazon Foyer Terrace

#### World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 291
Poster contribution NU-IN

### Speaker

Alexandre Creusot (Universite de Paris VII (FR))

### Description

The KM3NeT collaboration aims to build a km3-scale neutrino telescope in the Mediterranean Sea. The first phase of construction comprises the deep-sea and onshore infrastructures at the KM3NeT-It (100 km offshore Capo Passero, Italy) and KM3NeT-Fr (40 km offshore Toulon, France) sites and the installation of 31+7 detection units. For the next step (KM3NeT 2.0) completion of two detectors are planned as extension of the detectors realized during the first phase of construction: ARCA for high energies (E > TeV) in Italy and ORCA for low energies (GeV range) in France. A prototype digital optical module made of 31'' PMTs was deployed in April 2013 inside the ANTARES neutrino telescope. This prototype, attached to an ANTARES string, is operating since its installation. It validated the multi-PMT technology and demonstrated the capability to identify muons with a single optical module searching for local time coincidences between PMTs inside the optical module. A prototype detection unit made of three optical modules was installed at the KM3NeT-It site. It was deployed in May 2014; it is active and taking data. More than 700 hours of data have been recorded and analyzed. The experience achieved with this prototype detection unit validates the submarine deployment procedures, the mechanics and the electronic of the apparatus, the data taking and analysis procedures. Through the study of $~^{40}$K decay in sea water and dedicated data taking periods with flashing LED beacons, it is possible to calibrate in time the detector with nanosecond stability. A dedicated algorithm has been developed to select atmospheric muons and reconstruct their zenith angle with a resolution of about 8 degrees. An excellent agreement is found when comparing the detected signal from muons with Monte Carlo simulations. The performance and results of the two prototypes will be presented.
Registration number following "ICRC2015-I/" 477 KM3NeT

### Primary author

Dr Simone Biagi (INFN)

### Co-author

Alexandre Creusot (Universite de Paris VII (FR))