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Simultaneous analysis of ion and electron heat transport by power modulation in JET
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2011 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 51, no 11, 113016- p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2011. Vol. 51, no 11, 113016- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-51283DOI: 10.1088/0029-5515/51/11/113016ISI: 000296904000019OAI: oai:DiVA.org:kth-51283DiVA: diva2:463968
Funder
EU, European Research Council
Note
QC 20111212Available from: 2011-12-12 Created: 2011-12-12 Last updated: 2017-12-08Bibliographically approved

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Johnson, Thomas

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