Fast wave current drive in JET ITB-plasma

T. Hellsten, M. Laxåback, T. Bergkvist, T. Johnson, M. Mantsinen, G. Matthews, F. Meo, F. Nguyen, J.-M. Noterdaeme, C.C. Petty, Tuomas Tala, D. van Eester, P. Andrew, P. Beaumont, V. Bobkov, M. Brix, J. Brzozowski, L.G. Eriksson, C. Giroud, E. JoffrinV. Kiptily, J. Mailloux, M.-L. Mayoral, I. Monakhov, R. Sartori, A. Staebler, E. Rachlew, E. Tennfors, A. Tuccillo, A. Walden, K. D. Zastrow

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    Fast wave current drive has been performed in JET plasmas with internal transport barriers, ITBs, and strongly reversed magnetic shear. Although the current drive efficiency of the power absorbed on the electrons is fairly high, only small effects are seen in the central current density. The main reasons are the parasitic absorption of RF power, the strongly inductive nature of the plasma and the interplay between the fast wave driven current and bootstrap current. The direct electron heating in the FWCD experiments is found to be strongly degraded compared to that with the dipole phasing.
    Original languageEnglish
    Title of host publicationRadio Frequency Power in Plasmas
    Subtitle of host publication16th Topical Conference on Radio Frequency Power in Plasmas
    PublisherAmerican Institute of Physics (AIP)
    Pages273-278
    ISBN (Electronic)978-0-7354-0276-8
    ISBN (Print)0-7354-0276-0
    DOIs
    Publication statusPublished - 26 Sep 2005
    MoE publication typeA4 Article in a conference publication
    Event16th Topical Conference on Radio Frequency Power in Plasmas - Park City, United States
    Duration: 11 Apr 200513 Apr 2005

    Publication series

    SeriesAIP Conference Proceedings
    Number787
    ISSN0094-243X

    Conference

    Conference16th Topical Conference on Radio Frequency Power in Plasmas
    Country/TerritoryUnited States
    CityPark City
    Period11/04/0513/04/05

    Keywords

    • Fast Wave Current Drive
    • ICRH
    • ITB

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