A line-of-sight electron cyclotron emission receiver for electron cyclotron resonance heating feedback control of tearing modes

J.W. Oosterbeek, A. Bürger, E. Westerhof, M.R. de Baar, M.A. van den Berg, W.A. Bongers, M.F. Graswinckel, B.A. Hennen, O.G. Kruijt, J. Thoen, R. Heidinger, Søren Bang Korsholm, Frank Leipold, Stefan Kragh Nielsen

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    Abstract

    An electron cyclotron emission (ECE) receiver inside the electron cyclotron resonance heating (ECRH) transmission line has been brought into operation. The ECE is extracted by placing a quartz plate acting as a Fabry-Perot interferometer under an angle inside the electron cyclotron wave (ECW) beam. ECE measurements are obtained during high power ECRH operation. This demonstrates the successful operation of the diagnostic and, in particular, a sufficient suppression of the gyrotron component preventing it from interfering with ECE measurements. When integrated into a feedback system for the control of plasma instabilities this line-of-sight ECE diagnostic removes the need to localize the instabilities in absolute coordinates. (C) 2008 American Institute of Physics.
    Original languageEnglish
    JournalReview of Scientific Instruments
    Volume79
    Issue number9
    Pages (from-to)093503
    ISSN0034-6748
    DOIs
    Publication statusPublished - 2008

    Bibliographical note

    Copyright (2008) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

    Cite this

    Oosterbeek, J. W., Bürger, A., Westerhof, E., de Baar, M. R., van den Berg, M. A., Bongers, W. A., Graswinckel, M. F., Hennen, B. A., Kruijt, O. G., Thoen, J., Heidinger, R., Korsholm, S. B., Leipold, F., & Nielsen, S. K. (2008). A line-of-sight electron cyclotron emission receiver for electron cyclotron resonance heating feedback control of tearing modes. Review of Scientific Instruments, 79(9), 093503. https://doi.org/10.1063/1.2976665