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Title: Experimental investigation of silicon photomultipliers as compact light readout systems for gamma-ray spectroscopy applications in fusion plasmas

A matrix of Silicon Photo Multipliers has been developed for light readout from a large area 1 in. × 1 in. LaBr{sub 3} 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 E{sub γ} = 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:
;  [1] ;  [2] ; ; ;  [3] ;  [2] ;  [4] ; ;  [1] ; ;  [3]
  1. Dipartimento di Fisica “G. Occhialini,” Università degli Studi di Milano-Bicocca, Milano (Italy)
  2. (Italy)
  3. Dipartimento di Energia, CeSNEF, Politecnico di Milano, Milano (Italy)
  4. Istituto di Fisica del Plasma “P. Caldirola,” EURATOM-ENEA-CNR Association, Milano (Italy)
Publication Date:
OSTI Identifier:
22308633
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 11; Other Information: (c) 2014 Euratom; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COUNTING RATES; CRYSTALS; ENERGY RESOLUTION; EXPERIMENTAL DATA; GAMMA CAMERAS; GAMMA SPECTROSCOPY; LANTHANUM BROMIDES; MAGNETIC FIELDS; MEV RANGE; PHOTOMULTIPLIERS; PLASMA; PULSES; RADIATION SOURCES; READOUT SYSTEMS; SILICON; VISIBLE RADIATION