Strong Scattering of High Power Millimeter Waves in Tokamak Plasmas with Tearing Modes

E. Westerhof, Stefan Kragh Nielsen, J.W. Oosterbeek, Mirko Salewski, M.R. De Baar, W.A. Bongers, A. Bürger, B.A. Hennen, Søren Bang Korsholm, Frank Leipold, Dmitry Moseev, Morten Stejner Pedersen, D.J. Thoen

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    Abstract

    In tokamak plasmas with a tearing mode, strong scattering of high power millimeter waves, as used for heating and noninductive current drive, is shown to occur. This new wave scattering phenomenon is shown to be related to the passage of the O point of a magnetic island through the high power heating beam. The density determines the detailed phasing of the scattered radiation relative to the O-point passage. The scattering power depends strongly nonlinearly on the heating beam power. ©2009 The American Physical Society
    Original languageEnglish
    JournalPhysical Review Letters
    Volume103
    Issue number12
    Pages (from-to)125001
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2009

    Bibliographical note

    Copyright 2009 by the American Physical Society

    Keywords

    • Fusion energy

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