SPACE STRUCTURE ANALYSIS OF THE LARGE SCALE M/N = 1/1 PLASMA OSCILLATIONS BY MEANS OF X- AND O-ECE UNDER ECH AT T-10 TOKAMAK
Work supported by the Nuclear Science and Technology Department of RosAtom RF.
The space movement of plasma oscillations in m/n = 1/1 mode is analyzed. ECE from antennae disposing at the different points of poloidal and toroidal direction are used. On-axis slightly modulated ECH is applied for control of amplitudes and frequency of oscillations. It was found that oscillations occupy total area inside q = 3/2 radius. Maximal amplitudes correspond to ECH absorption zone. Simultaneous analysis of ECE in two polarization and also SXR detects the strong periodical "compressing and widening" of electron distribution function main body in the longitudinal direction. Such phenomenon creates plasma current pulsing at central. area and generation of high electric field splashes. The peculiarities of toroidal and poloidal movement of disturbance show that that is not pure rotating and can be explained as its "swinging" along magnetic force lines direction under continual drift plasma rotation.
