title: Performance of the prototype LaBr3spectrometer developed for the JET gamma-ray camera upgrade.
abstract: In this work, we describe the solution developed by the gamma ray camera upgrade enhancement project to improve the spectroscopic properties of the existing JET γ-ray camera. Aim of the project is to enable gamma-ray spectroscopy in JET deuterium-tritium plasmas. A dedicated pilot spectrometer based on a LaBr3crystal coupled to a silicon photo-multiplier has been developed. A proper pole zero cancellation network able to shorten the output signal to a length of 120 ns has been implemented allowing for spectroscopy at MHz count rates. The system has been characterized in the laboratory and shows an energy resolution of 5.5% at Eγ= 0.662 MeV, which extrapolates favorably in the energy range of interest for gamma-ray emission from fast ions in fusion plasmas.
authors.affiliation: Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Rigamonti
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Muraro
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 Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Perseo
authors.affiliation: Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland.
authors.forename: G
authors.initials: G
authors.lastname: Boltruczyk
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal.
authors.forename: A
authors.initials: A
authors.lastname: Fernandes
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal.
authors.forename: J
authors.initials: J
authors.lastname: Figueiredo
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Giacomelli
authors.affiliation: Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Gorini
authors.affiliation: Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Gosk
authors.affiliation: Culham Science Centre for Fusion Energy, Culham, United Kingdom.
authors.forename: V
authors.initials: V
authors.lastname: Kiptily
authors.affiliation: Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland.
authors.forename: S
authors.initials: S
authors.lastname: Korolczuk
authors.affiliation: Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland.
authors.forename: S
authors.initials: S
authors.lastname: Mianowski
authors.affiliation: EUROfusion Programme Management Unit, Culham Science Centre, OX14 3DB Abingdon, United Kingdom.
authors.forename: A
authors.initials: A
authors.lastname: Murari
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal.
authors.forename: R C
authors.initials: RC
authors.lastname: Pereira
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: E P
authors.initials: EP
authors.lastname: Cippo
authors.affiliation: Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland.
authors.forename: I
authors.initials: I
authors.lastname: Zychor
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Tardocchi
authors.affiliation: EUROfusion Consortium, JET, Culham Science Centre, Abingdon OX14 3DB, United Kingdom.