title: First neutron spectroscopy measurements with a pixelated diamond detector at JET.
abstract: A prototype Single crystal Diamond Detector (SDD) was installed at the Joint European Torus (JET) in 2013 along an oblique line of sight and demonstrated the possibility to carry out neutron spectroscopy measurements with good energy resolution and detector stability in discharges heated by neutral beam injection and radio-frequency waves. Starting from these positive results, within the Vertical Neutron Spectrometer project of the Joint European Torus, we have developed a pixelated instrument consisting of a matrix of 12 independent SDDs, called the Diamond Vertical Neutron Spectrometer (DVNS), which boosts the detection efficiency of a single SDD by an order of magnitude. In this paper we describe the main features of the DVNS, including the detector design, energy resolution, and data acquisition system for on-line processing. Preliminary spectroscopy measurements of 2.5 MeV neutrons from the present deuterium plasma at JET are finally presented.
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Muraro
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Giacomelli
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Nocente
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Rebai
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Rigamonti
authors.affiliation: Centro Ricerca ENEA-Frascati, Via E.Fermi 45, Frascati, Rome, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Belli
authors.affiliation: CNR-Istituto di Struttura della Materia (ISM), Via Salaria km 29.300, 00015 Monterotondo Scalo, Rome, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Calvani
authors.affiliation: Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal.
authors.forename: J
authors.initials: J
authors.lastname: Figueiredo
authors.affiliation: CNR-Istituto di Struttura della Materia (ISM), Via Salaria km 29.300, 00015 Monterotondo Scalo, Rome, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Girolami
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Gorini
authors.affiliation: Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Grosso
authors.affiliation: Culham Centre for Fusion Energy, Culham, 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, Lisbon, Portugal.
authors.forename: S
authors.initials: S
authors.lastname: Popovichev
authors.affiliation: CNR-Istituto di Struttura della Materia (ISM), Via Salaria km 29.300, 00015 Monterotondo Scalo, Rome, Italy.
authors.forename: D M
authors.initials: DM
authors.lastname: Trucchi
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.