Strong scattering of high power millimeter waves in tokamak plasmas with tearing modes

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Strong scattering of high power millimeter waves in tokamak plasmas with tearing modes

Journal Article (2009)

Author(s)

E. Westerhof (FOM-Institute for Plasma Physics Rijnhuizen)

S.K. Nielsen (Technical University of Denmark (DTU))

JW Oosterbeek (Forschungszentrum Jülich)

M. Salewski (Technical University of Denmark (DTU))

M.R. De Baar (FOM-Institute for Plasma Physics Rijnhuizen)

W.A. Bongers (FOM-Institute for Plasma Physics Rijnhuizen)

A. Bürger (Forschungszentrum Jülich)

B.A. Hennen (FOM-Institute for Plasma Physics Rijnhuizen)

S.B. Korsholm (Technical University of Denmark (DTU))

David Thoen (FOM-Institute for Plasma Physics Rijnhuizen)

undefined More Authors (External organisation)

DOI related publication

https://doi.org/10.1103/PhysRevLett.103.125001 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:d220b2f9-91fb-48af-9bad-75f6dd69e133

More Info

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Publication Year

2009

Language

English

Journal title

Physical Review Letters

Issue number

12

Volume number

103

Article number

125001

Downloads counter

222

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.