V. V. Bulanin, I. M. Balachenkov, V. I. Varfolomeev, V. K. Gusev, G. S. Kurskiev, V. B. Minaev, M. I. Patrov, A. V. Petrov, Yu. V. Petrov, A. M. Ponomarenko, A. Yu. Telnova, P. B. Shchegolev, A. Yu. Yashin, “Investigations of Alfvén modes at the Globus-M2 tokamak using a V-band multifrequency Doppler reflectometer”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2021, Volume 47, Issue 4,Pages <nobr>41

This article is cited in 10 papers

Investigations of Alfvén modes at the Globus-M2 tokamak using a V-band multifrequency Doppler reflectometer

V. V. Bulanin^ab, I. M. Balachenkov^b, V. I. Varfolomeev^b, V. K. Gusev^b, G. S. Kurskiev^b, V. B. Minaev^b, M. I. Patrov^b, A. V. Petrov^a, Yu. V. Petrov^b, A. M. Ponomarenko^a, A. Yu. Telnova^b, P. B. Shchegolev^b, A. Yu. Yashin^ab

^a Peter the Great St. Petersburg Polytechnic University
^b Ioffe Institute, St. Petersburg

Abstract: New information on the development of Alfvén modes in the Globus-M2 spherical tokamak is presented. The data were obtained using a V-band Doppler reflectometer with probing radiation frequencies from 50 to 75 GHz. A microwave harmonic synthesizer was used as a multifrequency probing source. As a result of using a new reflectometer, the localization of the toroidal Alfvén eigenmode has been determined at a magnetic field of 0.5 T. The spectral components of the Alfvén mode with Doppler frequency shifts due to toroidal plasma rotation have been recorded. The so-called Alfvén cascades have been investigated in the central regions of the discharge.

Keywords: spherical tokamak, Globus-M2, Alfven oscillations, runaway electrons.

Received: 14.10.2020
Revised: 11.11.2020
Accepted: 11.11.2020

DOI: 10.21883/PJTF.2021.04.50645.18584