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PMm2: R&D on triggerless acquisition for next generation neutrino experiments

par Drouet, S.;Genolini, Bernard;Hauchecorne, N.;Imre, Martin;Ky, Yun B.;Maltese, J.;Maroni, A.;Nguyen Trung, Tuan;Peyré, Jean;Pouthas, J.;Rindel, E.;Rosiere, Pascal ;Séminor, L.;Théneau, C.;Wanlin, E.;Campagne, J.E.;Conforti Di Lorenzo, S.;Dulucq, Frédéric;El Berni, A.;Gallas, Abraham;de La Taille, Christophe;Martin-Chassard, Gisèle;Duchesneau, Dominique;Dumont-Dayot, N.;Favier, Julien;Hermel, Richard;Tassan, J.;Zghiche, Amina;Hanson, Kael
Référence Journal of Instrumentation, 6, 1, C01081
Publication Publié, 2011-01

Article révisé par les pairs

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Résumé :

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. © 2011 IOP Publishing Ltd and SISSA.