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High-resolution gamma ray spectroscopy measurements of the fast ion energy distribution in JET He-4 plasmas (Articolo in rivista)

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High-resolution gamma ray spectroscopy measurements of the fast ion energy distribution in JET He-4 plasmas (Articolo in rivista) (literal)

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M. Nocente; M. Tardocchi; V.G. Kiptily; P. Blanchard; I. Chugunov; S. Conroy; T. Edlington; A.M. Fernandes; G. Ericsson; M. Gatu Johnson; D. Gin; G. Grosso; C. Hellesen; K. Kneupner; E. Lerche; A. Murari; A. Neto; R.C. Pereira; E. Perelli Cippo; S. Sharapov; A. Shevelev; J. Sousa; D.B. Syme; D. Van Eester; G. Gorini; JET-EFDA Contributors (2012)
High-resolution gamma ray spectroscopy measurements of the fast ion energy distribution in JET He-4 plasmas
in Nuclear fusion; International Atomic Energy Agency, Vienna (Austria)
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M. Nocente; M. Tardocchi; V.G. Kiptily; P. Blanchard; I. Chugunov; S. Conroy; T. Edlington; A.M. Fernandes; G. Ericsson; M. Gatu Johnson; D. Gin; G. Grosso; C. Hellesen; K. Kneupner; E. Lerche; A. Murari; A. Neto; R.C. Pereira; E. Perelli Cippo; S. Sharapov; A. Shevelev; J. Sousa; D.B. Syme; D. Van Eester; G. Gorini; JET-EFDA Contributors (literal)

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Article Number: 063009 http://biblioproxy.cnr.it:2290/0029-5515/52/6/063009/ La rivista è pubblicanta anche online con ISSN 1741-4326. (literal)

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http://iopscience.iop.org/0029-5515/52/6/063009/pdf/0029-5515_52_6_063009.pdf (literal)

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JET-EFDA, Culham Science Centre, Abingdon, OX14 3DB, UK; 1 Dipartimento di Fisica 'G. Occhialini', Università degli Studi di Milano-Bicocca, Piazza della Scienza 3, 20126, Milano, Italy; 2 Istituto di Fisica del Plasma 'Piero Caldirola', Associazione EURATOM-ENEA-CNR, via Cozzi 53, 20125, Milan, Italy; 3 JET-EFDA, Culham Science Centre, Abingdon, OX14 3DB, UK; 4 A.F. Ioffe Physico-Technical Institute, 194021, St Petersburg, Russian Federation; 5 Department of Physics and Astronomy, EURATOM-VR Association, Uppsala University, Uppsala, Sweden; 6 Instituto Superior Técnico, Centro de Fusão Nuclear, Associação EURATOM/IST, 1049-001, Lisboa, Portugal; 7 LPP-ERM/KMS, Association Euratom-'Belgian State', TEC Partner, B-1000, Brussels, Belgium; 8 Consorzio RFX, Padova, Italy. (M. Nocente 1,2, M. Tardocchi 2, V.G. Kiptily 3, P. Blanchard 3, I. Chugunov 4, S. Conroy 5, T. Edlington 3, A.M. Fernandes 6, G. Ericsson 5, M. Gatu Johnson 5, D. Gin 4, G. Grosso 2, C. Hellesen 5, K. Kneupner 3, E. Lerche 7, A. Murari 8, A. Neto 6, R.C. Pereira 6, E. Perelli Cippo 1, S. Sharapov 3, A. Shevelev 4, J. Sousa 6, D.B. Syme 3, D. Van Eester 7, G. Gorini 1,2 and JET-EFDA Contributors) (literal)

Titolo

High-resolution gamma ray spectroscopy measurements of the fast ion energy distribution in JET He-4 plasmas (literal)

Abstract

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. (literal)

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