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Neutron emission spectroscopy of D plasmas at JET with a compact liquid scintillating neutron spectrometer
CNR, Ist Fis Plasma P Caldirola, Milan, Italy.
ENEA CR Frascati, Dipartimento FSN, Rome, Italy.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2018 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 89, no 10, article id 10I113Article in journal (Refereed) Published
Abstract [en]

Neutron emission spectroscopy is a diagnostic technique that allows for energy measurements of neutrons born in nuclear reactions. The JET tokamak fusion experiment (Culham, UK) has a special role in this respect as advanced spectrometers for 2.5 MeV and 14 MeV neutrons have been developed here for the first time for measurements of the neutron emission spectrum from D and DT plasmas with unprecedented accuracy. Twin liquid scintillating neutron spectrometers were built and calibrated at the Physikalisch-Technische Bundesanstalt (PTB) (Braunschweig, Germany) and installed on JET in the recent years with tangential-equatorial (KM12) and vertical-radial (KM13) view lines, with the latter only recently operational. This article reports on the performance of KM12 and on the development of the data analysis methods in order to extract physics information upon D ions kinematics in JET auxiliary-heated D plasmas from 2.5 MeV neutron measurements. The comparison of these results with the correspondents from other JET neutron spectrometers is also presented: their agreement allows for JET unique capability of multi-lines of sight neutron spectroscopy and for benchmarking other 14 MeV neutron spectrometers installed on the same lines of sight in preparation for the DT experimental campaign at JET.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2018. Vol. 89, no 10, article id 10I113
National Category
Accelerator Physics and Instrumentation
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URN: urn:nbn:se:uu:diva-369752DOI: 10.1063/1.5038549ISI: 000449144500176PubMedID: 30399806OAI: oai:DiVA.org:uu-369752DiVA, id: diva2:1271744
Conference
22nd Biannual Topical Conference on High-Temperature Plasma Diagnostics (HTPD), APR 16-19, 2018, Gen Atom, San Diego, CA
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2018-12-18Bibliographically approved

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Binda, FedericoConroy, SeanEriksson, Jacob

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