Letter to the editor : studies of high frequency hot ion instabilities by means of correlation ECE on Tore Supra

V.S. Udintsev, M. Goniche, G. Giruzzi, G.T.A. Huysmans, F. Imbeaux, P. Maget, X. Garbet, R. Sabot, J.L. Ségui, F. Turco, T.P. Goodman, D. Molina, H. Weisen, Tore Supra Team

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25 Citations (Scopus)

Abstract

High frequency (>100 kHz) modes have been observed for the first time in combined LHCD and ICR-heated minority H (D) plasmas on Tore Supra by means of a correlation ECE diagnostic and by fluctuation reflectometers. These modes have been identified as the toroidicity-induced Alfvén eigenmodes (TAEs) that are destabilized by fast minority hydrogen ions with energies above 250 keV. In reversed central shear plasmas with non-linear oscillations of the central temperature, evolution of the TAE frequency is linked to the development of the local safety factor. This confirms that the central temperature and the q-profile evolve as a non-linearly coupled system in the so-called O-regime in Tore Supra.
Original languageEnglish
JournalPlasma Physics and Controlled Fusion
Volume48
Issue number3
DOIs
Publication statusPublished - 1 Mar 2006
Externally publishedYes

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