| Summary: | KM3NeT is an international collaboration constructing a km3-scale neutrino observatory being deployed at the Mediterranean Sea. The observatory uses the same technology in two different sites, detectors ARCA and ORCA, implementing large-scale detectors for the study of the high-energy neutrino flux and the determination of the neutrino mass ordering, but also with ports for the Earth and Sea Science. Detectors are made of large arrays of thousands of optical sensors able to detect the Cherenkov light induced by the interaction of leptons with the medium. Such arrays consist of vertical lines called Detection Units (DU) containing 18 Digital Optical Modules (DOMs). The DOM is a 17-inches glass sphere which is pressure-resistant and houses the 31 3-inches Photomultiplier Tubes (PMTs) which are the optical sensor. The operating principle of PMTs is based on the external photoelectric effect, where photons strike a photocathode at the entrance window and produce electrons by secondary emission. The purpose of this experimental research is to study the response of PMT in terms of efficiency, angular acceptance, and size of the signal. These properties are studied with the help of a setup consisting of a DOM inside of an "aquarium" filled with water, looking to emulate the operation conditions closely. The results from this study have provided a better understanding of the behavior of PMTs that play a crucial role in the KM3NeT event reconstruction, neutrino detection, and hence, in the success of its science programs. KM3NeT es una colaboración internacional que está construye un observatorio de neutrinos a escala km3 que se está desplegando en el mar Mediterráneo. El observatorio utiliza la misma tecnología en dos sitios diferentes, con los detectores ARCA y ORCA, implementando detectores a gran escala para el estudio del flujo de neutrinos de alta energía y la determinación de la jerarquía de masa de neutrinos, pero también permite estudios para las Ciencias de la Tierra y las Ciencias del Mar. Los detectores ...
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