PMm2: Large photomultipliers and innovative electronics for the next-generation neutrino experiment

This document presents the simulations and measurements which define the requirements for the photomultipliers and the electronics. A prototype of front-end electronics was successfully tested with 16 photomultiplier tubes supplied by a single high voltage, validating the built-in gain adjustment and the calibration principle. The first tests and calculations on the photomultiplier glass led to the study of a new package optimized for a 10 bar pressure in order to sustain the high underwater pressure.