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High-resolution gamma ray spectroscopy measurements of the fast ion energy distribution in JET He-4 plasmas
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2012 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 52, no 6, 063009- p.Article in journal (Refereed) Published
Abstract [en]

High-resolution gamma-ray measurements were carried out on the Joint European Torus (JET) in an experiment aimed at accelerating He-4 ions in the MeV range by coupling third harmonic radio frequency heating to an injected He-4 beam. For the first time, Doppler broadening of gamma-ray peaks from the C-12(d, p gamma)C-13 and Be-9(alpha, n gamma)C-12 reactions was observed and interpreted with dedicated Monte Carlo codes based on the detailed nuclear physics of the processes. Information on the confined He-4 and deuteron energy distribution was inferred, and confined He-4 ions with energies as high as 6 MeV were assessed. A signature of MHD activity in gamma-ray traces was also detected. The reported results have a bearing on diagnostics for fast ions in the MeV range in next step fusion devices.

Place, publisher, year, edition, pages
2012. Vol. 52, no 6, 063009- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-178696DOI: 10.1088/0029-5515/52/6/063009ISI: 000305091200013OAI: oai:DiVA.org:uu-178696DiVA: diva2:542619
Available from: 2012-08-02 Created: 2012-08-01 Last updated: 2017-12-07Bibliographically approved

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Conroy, SeanHellesen, Carl

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