Investigation of plasma poloidal rotation in the presence of a magnetic island in the FT-2 tokamak by Doppler enhanced scattering

D. Yu. Batyrev, A. B. Altukhov, A. D. Gurchenko, E. Z. Gusakov, L. A. Esipov, M. Yu. Kantor, D. V. Kouprienko, S. I. Lashkul

Ioffe Institute, St. Petersburg, Russia

Abstract: Plasma poloidal rotation velocity in the presence of a magnetic island with poloidal and toroidal mode numbers $m/n$ = 2/1 was measured using Doppler enhanced scattering technique. Inside the island, the magnitude of the perturbation of plasma poloidal rotation velocity was estimated; its value reached 250 m/s. Magnetic island's contribution to the perturbation of the average plasma poloidal rotation velocity appeared to be maximum near its boundaries, where it reached 8–17%.

Keywords: perturbation of plasma velocity in a tokamak, magnetic island, Doppler enhanced scattering.

Received: 03.11.2023
Revised: 29.01.2024
Accepted: 17.02.2024

DOI: 10.61011/PJTF.2024.11.57900.19792

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