| Zugriffsnummer | 27270 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | The compact neutron spectrometer at ASDEX Upgrade |
| Autor(in); Institution |
Giacomelli, Luca; 6.5, Neutronenstrahlung, PTB-Braunschweig; CNISM, Dipartimento di Fisica, Università degli Studi di Milano-Bicocca, ITALY; Istituto di Fisica del Plasma, EURATOM-ENEA-CNR, Milano, ITALY
Zimbal, Andreas; 6.5, Neutronenstrahlung, PTB-Braunschweig
Tittelmeier, Kai; 6.5, Neutronenstrahlung, PTB-Braunschweig
Schuhmacher, Helmut; 6.5, Neutronenstrahlung, PTB-Braunschweig
Tardini, G.; Max-Planck Institut für Plasmaphysik, EURATOM Association, Garching, GERMANY
Neu, R.; Max-Planck Institut für Plasmaphysik, EURATOM Association, Garching, GERMANY
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| Quelle/Jahr | Review of Scientific Instruments: 82 (2011), 12, 123504-1 - 123504-10 |
| ISSN | 0034-6748 (PRINT) ; 1089-7623 (ONLINE) |
| DOI | |
| Verlag | Melville, NY: American Institute of Physics |
| Konferenzangaben | 38th Conference on Plasma Physics, EPS2011, Strasbourg, 27, June - 01, July, 2011, France |
| Klassifikationscode | PACS: 29.30.Hs ; PACS: 29.40.Mc |
| Freie Schlagworte | liquid scintillation detectors ; neutron spectrometers |
| Zusammenfassung | The first neutron spectrometer of ASDEX Upgrade (AUG) was installed in November 2008. It is a compact neutron spectrometer (CNS) based on a BC501A liquid scintillating detector, which can simultaneously measure 2.45-MeV and 14-MeV neutrons emitted from deuterium (D) plasmas and γ radiation. The scintillating detector is coupled to a digital pulse shape discrimination data acquisition (DPSD) system capable of count rates up to 106s-1. The DPSD system can operate in acquisition and processing mode. With the latter n-γ discrimination is performed off-line based on the two-gate method. The paper describes the tests of the CNS and its installation at AUG. The neutron emission from the D plasma measured during a discharge with high auxiliary heating power was used to validate the CNS performance. The study of the optimal settings for the DPSD data processing to maximize the n-γ discrimination capability of the CNS is reported. The CNS measured both 2.45-MeV and 14-MeV neutrons emitted in AUG D plasmas with a maximum count rate of 5.4 × 105s-1 (> 10 times higher than similar spectrometers previously achieved) with an efficiency of 9.3 × 10-10 events per AUG neutron. |
