Characterization of the 118-GHz ECRH output beam on Tore Supra

Loys Courtois; R. Magne; Alain Becoulet; Ted Jini Smail; D. Roux; C. Desgranges; C. Lievin; J. Achard; A. Barbuti; Gilles Berger-By; F. Bouquey; J. Clary; C. Darbos; F. Legrand; M. Lennholm; P. Messina; H. Roche

doi:10.1117/12.422156

18 December 2000 Characterization of the 118-GHz ECRH output beam on Tore Supra

Loys Courtois, R. Magne, Alain Becoulet, Ted Jini Smail, D. Roux, C. Desgranges, C. Lievin, J. Achard, A. Barbuti, Gilles Berger-By, F. Bouquey, J. Clary, C. Darbos, F. Legrand, M. Lennholm, P. Messina, H. Roche

Author Affiliations +

Proceedings Volume 4111, Terahertz and Gigahertz Electronics and Photonics II; (2000) https://doi.org/10.1117/12.422156
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

The characterization of the electromagnetic field at the electron cyclotron frequency is one important point for the ECRH installation under development at the CEA Cadarache. This characterization is based on a mathematical decomposition of the electromagnetic field over the various radiating modes of an oversized corrugated waveguide. To perform this determination, which principle is given in the paper, one has to access the amplitude and the phase of the full electric field on a plane transverse to the propagation direction. It is possible to obtain amplitude and phase diagrams of the two crossed polarization at low level. At high level, in the output of a gyrotron, one uses only thermal measurements and the phase is reconstructed from the amplitude diagrams. The paper exposes a compete validation of this method and gives and results of the high level characterization.

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Loys Courtois, R. Magne, Alain Becoulet, Ted Jini Smail, D. Roux, C. Desgranges, C. Lievin, J. Achard, A. Barbuti, Gilles Berger-By, F. Bouquey, J. Clary, C. Darbos, F. Legrand, M. Lennholm, P. Messina, and H. Roche "Characterization of the 118-GHz ECRH output beam on Tore Supra", Proc. SPIE 4111, Terahertz and Gigahertz Electronics and Photonics II, (18 December 2000); https://doi.org/10.1117/12.422156

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