The anomalous currents in the front foils of the JET lost alpha diagnostic KA-2 (Articolo in rivista)

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  • The anomalous currents in the front foils of the JET lost alpha diagnostic KA-2 (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.3502040 (literal)
Alternative label
  • Cecil F. E.; Kiptily V.; Salmi A.; Horton A.; Fullard, K.; Murari A.; Darrow D.; Hill K.; JET-EFDA Contributors (2010)
    The anomalous currents in the front foils of the JET lost alpha diagnostic KA-2
    in Review of scientific instruments; American Institute of Physics, Melville [NY] (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cecil F. E.; Kiptily V.; Salmi A.; Horton A.; Fullard, K.; Murari A.; Darrow D.; Hill K.; JET-EFDA Contributors (literal)
Pagina inizio
  • 10D326 (literal)
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  • Article Number 10D326. La rivista è pubblicata anche online con ISSN 1089-7623. (literal)
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  • http://rsi.aip.org/resource/1/rsinak/v81/i10/p10D326_s1 (literal)
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  • 81 (literal)
Rivista
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  • Issue 10, Article Number 10D326 (literal)
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  • 4 (literal)
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  • 10 (literal)
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  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
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  • 1 Colorado School of Mines, Golden, Colorado 80401, USA / - 2 Culham Science Center, Euratom/CCFE Fusion Association, Abingdon, Oxon, United Kingdom / - 3 Consorzio RFX-Associazione EURATOM ENEA per la Fusione, I-35127 Padova, Italy / - 4 Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA. (F. E. Cecil 1, V. Kiptily 2, A. Salmi 2, A. Horton 2, K. Fullard 2, A. Murari 3, D. Darrow 4, K. Hill 4, JET-EFDA Contributors 2) (literal)
Titolo
  • The anomalous currents in the front foils of the JET lost alpha diagnostic KA-2 (literal)
Abstract
  • We have examined the observed currents in the front foils of the JET Faraday cup lost alpha particle diagnostic KA-2. In particular, we have sought to understand the currents during Ohmic plasmas for which the ion flux at the detectors was initially assumed to be negligible. We have considered two sources of this current: plasma ions (both deuterium and impurity) in the vicinity of the detector (including charge exchange neutrals) and photoemission from scattered UV radiation. Based upon modeling and empirical observation, the latter source appears most likely and, moreover, seems to be applicable to the currents in the front foil during ELMy H-mode plasmas. A very thin gold or nickel foil attached to the present detector aperture is proposed as a solution to this problem, and realistic calculations of expected fluxes of lost energetic neutral beam ions during TF ripple experiments are presented as justification of this proposed solution. (literal)
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