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Direct experimental measurements of the optical depth have given a global confirmation of the relativistic theory of wave absorption at the 3rd electron cyclotron harmonic. These results are a sound basis for heating experiments at the 3rd harmonic. For adequate first-pass absorption, long path lengths are required and the microwave beam needs to be launched at a shallow angle to the resonance line, for example, nearly vertically. However, the absorption line being rather narrow and sensitive to paramagnetic effects, this heating scenario calls for a sophisticated launching system, providing good localisation, low beam divergence and good control of the launching angles.

Additional information

Authors: SÉGUI J L ET AL., CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);GOODMAN T ET AL., Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne (CH);SEGUI J L ET AL., CEA, Departement de Recherches sur la Fusion Controlee, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Article: Proceedings of the 21st EPS Conference on Controlled Fusion and Plasma Physics, pp. 1004-1007
Record Number: 199510149 / Last updated on: 1995-08-22
Original language: en
Available languages: en