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Estimating the neutron yield in a deuterium plasma with the JET neutron camera

Hägg, Linus (author)
Uppsala universitet,Tillämpad kärnfysik
Binda, Federico (author)
Översättravägen 17, 184 70 Åkersberga, Stockholms län, Sweden
Conroy, Sean (author)
Uppsala universitet,Tillämpad kärnfysik
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Ericsson, Göran (author)
Uppsala universitet,Tillämpad kärnfysik
Ghani, Zamir (author)
United Kingdom Atomic Energy Authority, Culham Science Centre 3 , Abingdon, Oxon OX14 3DB, United Kingdom
Giacomelli, Luca (author)
European Commission—Joint Research Centre 4 , Via Enrico Fermi 2749, 21027 Ispra, VA, Italy
Marocco, Daniele (author)
Fusion and Technology for Nuclear Safety and Security Department, ENEA, C.R. Frascati 5 , Via E. Fermi 45, I-00044 Frascati, Roma, Italy
Milocco, Alberto (author)
University of Milano–Bicocca University, Physics Department “G. Occhialini,” 6 Milano, Italy
Riva, Marco (author)
Fusion and Technology for Nuclear Safety and Security Department, ENEA, C.R. Frascati 5 , Via E. Fermi 45, I-00044 Frascati, Roma, Italy
Andersson Sundén, Erik (author)
Uppsala universitet,Tillämpad kärnfysik
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 (creator_code:org_t)
American Institute of Physics (AIP), 2023
2023
English.
In: Review of Scientific Instruments. - : American Institute of Physics (AIP). - 0034-6748 .- 1089-7623. ; 94:7
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The JET neutron camera is a well-established detector system at JET, which has 19 sightlines each equipped with a liquid scintillator. The system measures a 2D profile of the neutron emission from the plasma. A first principle physics method is used to estimate the DD neutron yield that is based on JET neutron camera measurements and is independent of other neutron measurements. This paper details the data reduction techniques, models of the neutron camera, simulations of neutron transport, and detector responses used to this end. The estimate uses a simple parameterized model of the neutron emission profile. The method makes use of the JET neutron camera’s upgraded data acquisition system. It also accounts for neutron scattering near the detectors and transmission through the collimator. These components together contribute to 9% of the detected neutron rate above a 0.5 MeVee energy threshold. Despite the simplicity of the neutron emission profile model, the DD neutron yield estimate falls on average within 10% agreement with a corresponding estimate from the JET fission chambers. The method can be improved by considering more advanced neutron emission profiles. It can also be expanded to estimate the DT neutron yield with the same methodology.

Subject headings

NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)

Keyword

Physics with specialization in Nuclear Physics
Fysik med inriktning mot kärnfysik

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