ECH AND ECE APPLICATION FOR SPECTRAL ANALYSIS OF THE GLOBAL PLASMA OSCILLATIONS AT TOKAMAK: EXPERIMENTS ON T-10

The spectral characteristics of the large scale (MHD) plasma oscillations were investigated. ECH was used for a modification of plasma parameters. Main tool of the analysis was the high space resolution ECE method. The selection of different modes of oscillations was fulfilled. The simple relations between the eigen-frequencies of oscillations and the radii of the corresponding rational magnetic surfaces were discovered. The absolute values of all measured eigen-frequencies coincide well with the calculation by the introduced formula.