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

F. Ryter, C. Angioni, C. Giroud, A.G. Peeters, T. Biewer, R. Bilato, E. Joffrin, T. Johnson, H. Leggate, E. Lerche, G. Madison, P. Mantica, D. Van Eester, I. Voitsekhovitch

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Abstract

Heating power modulation experiments using ion cyclotron resonance heating (ICRH) in the 3He 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 3He 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. © 2011 IAEA, Vienna.
Original languageEnglish
Article number113016
Pages (from-to)-
JournalNuclear Fusion
Volume51
Issue number11
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Nuclear and High Energy Physics

Cite this

Ryter, F., Angioni, C., Giroud, C., Peeters, A. G., Biewer, T., Bilato, R., ... Voitsekhovitch, I. (2011). Simultaneous analysis of ion and electron heat transport by power modulation in JET. Nuclear Fusion, 51(11), -. [113016]. https://doi.org/10.1088/0029-5515/51/11/113016