Abstract
KM3NeT-ARCA is a deep sea high energy neutrino detector. A detection unit prototype was deployed in the future KM3NeT-ARCA deep-sea site, off of the Sicilian coast. This detection unit is composed of a line of 3 digital optical modules with 31 photomultiplier tubes on each one. The prototype detection unit was operated since its deployment in May 2014 until its decommissioning in July 2015. The results of the calibration of this detection unit and its simulation are presented and discussed.
Highlights
KM3NeT represents the generation of Mediterranean undersea telescope, following the technical and scientific results of the ANTARES [1] neutrino telescope and the NEMO [2] and NESTOR [3] pilot projects
The photomultiplier tubes (PMT) model installed in digital optical modules (DOM) 1 and DOM 2 is the D783KFLA produced by ETEL [6], while DOM 3 contains the R1219902 Hamamatsu PMTs [7]
It is based on 4 main steps:The charged lepton directionality and energy are simulated a priori with the fast MUPAGE code [12], as a function of the water properties, to be propagated in the km3 simulation can; the density of the Cherenkov photons production is calculated along the lepton (∼100/cm); the photon probability density as a function on time is calculated along the Cherenkov front; at the position of each Optical module the probability to be detected is calculated as a function of the step-by-step simulation tabulated results
Summary
KM3NeT represents the generation of Mediterranean undersea telescope, following the technical and scientific results of the ANTARES [1] neutrino telescope and the NEMO [2] and NESTOR [3] pilot projects. KM3NeT uses 17 inch digital optical modules (DOM) containing 31 3 inches photomultiplier tubes (PMT) for a total of photocathode area of 1400 cm2 [4]. In May 2014, a prototype detection unit (Pre-Production Model DU, PPM-DU) with 3 DOMs was installed 80 km off the Sicily [5]. This prototype implements the mechanical structure, the electro-optical power supply and communication, allowing simultaneous data taking of the three DOMs. The PMT model installed in DOM 1 and DOM 2 is the D783KFLA produced by ETEL [6], while DOM 3 contains the R1219902 Hamamatsu PMTs [7].
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