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Status of the RTP Pulsed-Radar Reflectometer and Prospects for ITER

  • S. H. Heijnen
  • C. A. J. Hugenholtz
  • H. J. van de Meiden
  • A. J. H. Donné

Abstract

At the Rijnhuizen Tokamak Experiment (RTP) in the Netherlands, a four-channel pulsed-radar reflectometer is developed and installed. Carrier frequencies of 29, 33, 36 and 39GHz are modulated with sub-nanosecond pulses and transmitted in the O-mode. This means that these pulses, once transmitted into the plasma, will reflect from a critical density layer where the plasma frequency equals the probing frequency. The time of flight of these pulses is detected with an accuracy of 70ps, corresponding to an accuracy of 1cm when reflections from a metal mirror in vacuum are detected.

Keywords

Density Profile Transmission Measurement Flight Time Metal Mirror Shafranov Shift 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    S.H. Heijnen, Thesis University of Utrecht, September 1995.Google Scholar
  2. 2.
    D.L. Grekov, O.S. Pavlichenko and A.I. Skibenko, ITER-IL-PH-07-0-56 (1990).Google Scholar
  3. 3.
    S.H. Heijnen, A.J.H. Donné, C.A.J. Hugenholtz, Th.F.M.M. Maas, H.J. van der Meiden, F.C. Schüller and the RTP-team, Proc. 22th EPS Conf. on Contr. Fusion and Plasma Phys., Bournemouth (1995). To be publishedGoogle Scholar

Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • S. H. Heijnen
    • 1
  • C. A. J. Hugenholtz
    • 1
  • H. J. van de Meiden
    • 1
  • A. J. H. Donné
    • 1
  1. 1.FOM-Instituut voor Plasmafysica ’Rijnhuizen’Association Euratom-FOMNieuwegeinThe Netherlands

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