| Summary: | The KM3NeT Collaboration is building and operating the biggest deep-sea multidisciplinary and multipurpose research infrastructure of the Northern Hemisphere that will host the next generation neutrino telescopes. They are being located at two sites in the Mediterranean Sea, at a depth of about 2500-3500 meters, at ORCA and ARCA sites. The goal of ARCA is to detect and study high-energy cosmic neutrino sources; meanwhile, ORCA aims to study neutrino mass hierarchy and oscillation parameters from atmospheric neutrinos. For this purpose, KM3NeT is suited with arrays of thousands of Photo-Multiplier Tubes (PMTs) for detecting the Cherenkov light induced by charged leptons, produced by neutrino interactions, exceeding the phase velocity of light in the medium or surroundings. Thirty-one, 3-inch PMTs are contained inside Digital Optical Modules (DOMs), which are protected by a 17-inch spherical case. This vessel is made of 14-mm thick borosilicate glass (Vitrovex), resistant to the high pressure of the harsh deep-sea environment. Vitrovex seems to contain traces of isotopes such as 40K, 232Th, and 238U, which its sub-products are released in seawater and inside Vitrovex itself. 40K releases the most significant amount of relativistic electrons that exceed Cherenkov threshold energy in the medium, causing signals that constitute an Optical Background that must be disentangled from signals induced by neutrino interactions with the environment. KM3NeT es una colaboración internacional que se encuentra construyendo y perando la infraestructura de investigación submarina más grande, multidisciplinaria y ultipropósito del hemisferio norte que albergará la siguiente generación de telescopios de neutrinos. Estos están siendo ubicados en dos sitios del Mar Mediterráneo que corresponden a ORCA y ARCA, entre 2500-3500 metros de profundidad. El objetivo de ORCA es estudiar la jerarquía de masas de neutrinos y los parámetros de oscilación con neutrinos atmosféricos, mientras que ARCA está optimizado para detectar y estudiar ...
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