Fast-ion dynamics in the TEXTOR tokamak measured by collective Thomson scattering

H. Bindslev, S.K. Nielsen, L. Porte, J.A. Hoekzema, Søren Bang Korsholm, F. Meo, Poul Michelsen, S. Michelsen, J.W. Oosterbeek, E.L. Tsakadze, E. Westerhof, P. Woskov

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Here we present the first measurements by collective Thomson scattering of the evolution of fast-ion populations in a magnetically confined fusion plasma. 150 kW and 110 Ghz radiation from a gyrotron were scattered in the TEXTOR tokamak plasma with energetic ions generated by neutral beam injection and ion cyclotron resonance heating. The temporal behavior of the spatially resolved fast-ion velocity distribution is inferred from the received scattered radiation. The fast-ion dynamics at sawteeth and the slowdown after switch off of auxiliary heating is resolved in time. The latter is shown to be in close agreement with modeling results.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume97
    Issue number20
    Pages (from-to)205005
    Number of pages4
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2006

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