Strong scattering of high power millimeter waves in tokamak plasmas with tearing modes
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Updated: Jun 19, 2026

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
E Westerhof1, S K Nielsen, J W Oosterbeek
1FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM Trilateral Euregio Cluster, Nieuwegein, The Netherlands.
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.
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