title: Experimental investigation of silicon photomultipliers as compact light readout systems for gamma-ray spectroscopy applications in fusion plasmas.
abstract: A matrix of Silicon Photo Multipliers has been developed for light readout from a large area 1 in. × 1 in. LaBr3 crystal. The system has been characterized in the laboratory and its performance compared to that of a conventional photo multiplier tube. A pulse duration of 100 ns was achieved, which opens up to spectroscopy applications at high counting rates. The energy resolution measured using radioactive sources extrapolates to 3%-4% in the energy range Eγ = 3-5 MeV, enabling gamma-ray spectroscopy measurements at good energy resolution. The results reported here are of relevance in view of the development of compact gamma-ray detectors with spectroscopy capabilities, such as an enhanced gamma-ray camera for high power fusion plasmas, where the use of photomultiplier is impeded by space limitation and sensitivity to magnetic fields.
authors.affiliation: Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Nocente
authors.affiliation: Dipartimento di Energia, CeSNEF, Politecnico di Milano, Milano, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Fazzi
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," EURATOM-ENEA-CNR Association, Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Tardocchi
authors.affiliation: Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Cazzaniga
authors.affiliation: Dipartimento di Energia, CeSNEF, Politecnico di Milano, Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Lorenzoli
authors.affiliation: Dipartimento di Energia, CeSNEF, Politecnico di Milano, Milano, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Pirovano
authors.affiliation: Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Rebai
authors.affiliation: Dipartimento di Energia, CeSNEF, Politecnico di Milano, Milano, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Uboldi
authors.affiliation: Dipartimento di Energia, CeSNEF, Politecnico di Milano, Milano, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Varoli
authors.affiliation: Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Gorini