Fast-ion redistribution due to sawtooth crash in the TEXTOR tokamak measured by collective Thomson scattering

Stefan Kragh Nielsen, Henrik Bindslev, Mirko Salewski, A. Bürger, E. Delabie, Vedran Furtula, M. Kantor, Søren Bang Korsholm, Frank Leipold, Fernando Meo, Poul Michelsen, Dmitry Moseev, J.W. Oosterbeek, Morten Stejner Pedersen, E. Westerhof, P. Woskov

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Here we present collective Thomson scattering measurements of 1D fast-ion velocity distribution functions in neutral beam heated TEXTOR plasmas with sawtooth oscillations. Up to 50% of the fast ions in the centre are redistributed as a consequence of a sawtooth crash. We resolve various directions to the magnetic field. The fast-ion distribution is found to be anisotropic as expected. For a resolved angle of 39° to the magnetic field we find a drop in the fast-ion distribution of 20–40%. For a resolved angle of 83° to the magnetic field the drop is no larger than 20%.
    Original languageEnglish
    JournalPlasma Physics and Controlled Fusion
    Volume52
    Issue number9
    Pages (from-to)092001
    ISSN0741-3335
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Fusion energy

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