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The linear relativistic theory of electron cyclotron wave propagation predicts partial absorption of the extraordinary mode at the third electron cyclotron harmonic for typical parameters of present day tokamak plasmas. Since the waves are not totally damped, a quantitative confirmation of such predictions is important to establish this particular resonance scheme firmly for plasma heating and current drive. Specific experiments have been performed on Tore Supra, to measure the optical thickness of the third harmonic extraordinary mode for vertical propagation, over the full frequency spectrum. Comparison with ray tracing/absorption calculations provides a direct validation of the linear relativistic theory.

Additional information

Authors: SEGUI J-L ET AL, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);GOODMAN T P ET AL, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherche en Physique des Plasmas (CH)
Bibliographic Reference: Article: Nuclear Fusion, Vol. 36 (1996) No. 2, pp. 237-241
Record Number: 199610501 / Last updated on: 1996-05-13
Original language: en
Available languages: en
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