First neutron spectroscopy measurements with a pixelated diamond detector at JET

Journal Article · Tue Nov 15 00:00:00 EST 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4961557· OSTI ID:22596398

Giacomelli, L.; Grosso, G.; Tardocchi, M. ^[1]; Nocente, M.; Rebai, M.; Rigamonti, D.; Gorini, G. ^[1]; Belli, F. ^[2]; Calvani, P.; Girolami, M.; Trucchi, D. M. ^[3]; Figueiredo, J. ^[4]; Murari, A. ^[5]; Consorzio RFX, Padova ^[6]; Popovichev, S. ^[4]

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1. Istituto di Fisica del Plasma “P. Caldirola,” CNR, Milano (Italy)
2. Centro Ricerca ENEA-Frascati, Via E.Fermi 45, Frascati, Rome (Italy)
3. CNR—Istituto di Struttura della Materia (ISM), Via Salaria km 29.300, 00015 Monterotondo Scalo, Rome (Italy)
4. Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon (Portugal)
5. Culham Centre for Fusion Energy, Culham (United Kingdom)
6. CNR, ENEA, INFN, Università di Padova, Acciaierie Venete SpA; Italy

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.

• OSTI ID: 22596398
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 11; Other Information: (c) 2016 EURATOM; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM INJECTION
DATA ACQUISITION
DATA ACQUISITION SYSTEMS
DEUTERIUM
DIAMONDS
ENERGY RESOLUTION
JET TOKAMAK
MEV RANGE 01-10
MONOCRYSTALS
NEUTRON SPECTROMETERS
NEUTRON SPECTROSCOPY
NEUTRONS
RADIOWAVE RADIATION