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Topical Workshop on Electronics for Particle Physics 2010, TWEPP 2010, Aachen : Allemagne (2010)
PMm2: R&D on triggerless acquisition for next generation neutrino experiments
J.-E. Campagne1, S. Conforti Di Lorenzo1, S. Drouet, D. Duchesneau2, F. Dulucq1, N. Dumont-Dayot2, A. El Berni1, J. Favier2, A. Gallas1, B. Genolini3, K. Hanson, N. Hauchecorne3, R. Hermel2, M. Imre3, B. Ky3, C. de La Taille1, J. Maltese3, A. Maroni3, G. Martin-Chassard1, T. Nguyen Trung3, J. Peyré3, J. Pouthas3, E. Rindel3, P. Rosier3, L. Séminor3, J. Tassan2, C. Théneau3, E. Wanlin3, A. Zghiche2
PMm2 Collaboration(s)

The next generation of proton decay and neutrino experiments, the post-SuperKamiokande detectors, such as those that will take place in megaton size water tanks, will require very large surfaces of photo-detection and will produce a large volume of data. Even with large hemispherical photomultiplier tubes (PMTs), the expected number of channels should reach hundreds of thousands. An ANR funded R&D program to implement a solution is presented here. The very large surface of photo-detection is segmented in macro pixels consisting of an array (2 × 2 m2) of 16 hemispherical 12-inch PMTs connected to autonomous underwater front-end electronics working in a triggerless data acquisition mode. The array is powered by a common high voltage and only one data cable allows the connection by network to the surface controller. This architecture allows a considerable reduction of the cost and facilitates the industrialization. This paper presents the complete architecture of the prototype system and tests results with 16 8-inch PMTs, validating the whole electronics, the built-in gain adjustment and the calibration principle.
1 :  LAL - Laboratoire de l'Accélérateur Linéaire
2 :  LAPP - Laboratoire d'Annecy le Vieux de Physique des Particules
3 :  IPNO - Institut de Physique Nucléaire d'Orsay
Sciences de l'ingénieur/Micro et nanotechnologies/Microélectronique

Physique/Physique/Instrumentations et Détecteurs
VLSI circuits – Modular electronics – Large detector systems for particle and astroparticle physics – Front-end electronics for detector readout