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Simultaneous analysis of ion and electron heat transport by power modulation in JET

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Ryter, F., Angioni, C. (Clemente), Giroud, C. (Carine), Peeters, A. G., Biewer, T., Bilato, R., Joffrin, E., Johnson, T., Leggate, H., Lerche, Ernesto Augusto, Madison, G., Mantica, P. (Paola), Van Eester, D. (Dirk) and Voitsekhovitch, I. (2011) Simultaneous analysis of ion and electron heat transport by power modulation in JET. Nuclear Fusion, Volume 51 (Number 11). Article: 113016. doi:10.1088/0029-5515/51/11/113016

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Official URL: http://dx.doi.org/10.1088/0029-5515/51/11/113016

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Abstract

Heating power modulation experiments using ion cyclotron resonance heating (ICRH) in the (3)He minority scheme have been performed in the JET tokamak to investigate heat transport properties. This RF scheme provides a dominant localized ion heating, but also some electron heating, and therefore both ion and electron heat channels were modulated. This allows us to carry out a simultaneous transport analysis of ion and electron heat transport channels, including transient transport phenomena. This also provides an experimental assessment of the ICRH heat sources of the (3)He scheme. The modulation approach, so far widely used for electron transport studies, has been validated for ion heat transport in these experiments and yields results on stiffness and threshold of the ion temperature gradient (ITG)-driven ion heat transport. The results for the electron channel demonstrate the importance of the ITG-driven, off-diagonal, contribution to electron heat transport in plasmas with significant ion heating.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): JET Project, Electron cyclotron resonance sources, Plasma confinement, Tokamaks, Heat -- Transmission
Journal or Publication Title: Nuclear Fusion
Publisher: Institute of Physics Publishing Ltd.
ISSN: 0029-5515
Official Date: November 2011
Dates:
DateEvent
November 2011Published
Volume: Volume 51
Number: Number 11
Page Range: Article: 113016
DOI: 10.1088/0029-5515/51/11/113016
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Euratom-IPP Association, European Fusion Development Agreement

Data sourced from Thomson Reuters' Web of Knowledge

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