PMT gain calibration and monitoring based on highly compressed hit information in KM3NeT

TL;DR

This paper presents a gain calibration method for KM3NeT's photomultiplier tubes that uses highly compressed hit data to achieve 2% accuracy in gain tuning, enhancing the detector's precision.

Contribution

It introduces a novel calibration approach utilizing compressed hit information, improving gain accuracy in large-scale neutrino telescopes.

Findings

PMT gains can be calibrated within 2% of nominal values.

Calibration method effectively uses compressed single photoelectron data.

Enhances the precision of neutrino detection in KM3NeT.

Abstract

The cubic-kilometre neutrino telescope, which consists of large-scale 3D-arrays of photomultiplier tubes (PMTs) currently under construction on the Mediterranean seabed, relies on accurate calibration procedures in order to answer its science goals. These proceedings present the gain calibration method used in KM3NeT, which is based on highly compressed PMT hit information. In particular, it is shown that the PMT gains can be tuned to within 2% of the nominal value, based on the measured single photoelectron time-over-threshold distribution of each PMT.