Co- and Counter - viewing oblique ECE measurements during ECH and ECCD on the TCV tokamak

T.P. Goodman, V.S. Udintsev, F. Felici, C. Zucca, Ch. Schlatter

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Using a new LFS receiving antenna in the oblique ECE configuration, we measure the emission during central co-ECCD and counter-ECCD discharges. The asymmetry of the electron distribution function (EDF) resulting from ECCD is put into evidence by performing 4 successive discharges measuring quasi-X mode and quasi-O mode in 2 separate discharges; then, repeating these measurements while viewing in the opposite toroidal direction. The plasma configuration and EC injection are identical in the 4 cases. The ratios of the X-mode signals are compared to simulations of the ECE by the NOTECTCV code and are found to be generally consistent with emission from a small, drifting, suprathermal, electron population carrying the ECCD current of the order calculated by the TORAY-GA code.
Original languageEnglish
Title of host publicationProceedings of 34th European Physical Society Conference on Plasma Physics, 2-6 July, 2007, Warsaw, Poland
Publication statusPublished - 2007

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