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- Title
Effect of Plasma Toroidal Rotation on Toroidal Alfvén Eigenmode Spectrum in Globus-M2 Spherical Tokamak.
- Authors
Balachenkov, I. M.; Petrov, Yu. V.; Gusev, V. K.; Bakharev, N. N.; Zhiltsov, N. S.; Kurskiev, G. S.; Minaev, V. B.; Miroshnikov, I. V.; Ponomarenko, A. M.; Sakharov, N. V.; Telnova, A. Yu.; Tkachenko, E. E.; Shchegolev, P. B.; Yashin, A. Yu.
- Abstract
In experiments with neutral beam injection on the Globus-M2 spherical tokamak, sequences of long-lasting harmonics of toroidal Alfvén modes were discovered, equidistant from each other in frequency and shifted from zero by a constant value. Using microwave Doppler backscattering diagnostics, the central localization of toroidal modes was determined. In this work, the possibility of "splitting" of toroidal harmonics due to the Doppler shift caused by the toroidal rotation of the plasma is being discussed. It is found that the unshifted frequency of the toroidal Alfvén mode obtained from the spectrum of the magnetic probe signal is in good agreement with the frequency of the mode calculated at the mode location radius, and the toroidal rotation frequency, also determined from the spectrum of the magnetic probe signal, correlates well with the rotation frequency measured using charge exchange spectroscopy diagnostics, but differs by a constant amount. Possible reasons for the discrepancies are being discussed.
- Subjects
TOROIDAL plasma; PLASMA flow; TOROIDAL harmonics; CHARGE exchange; PLASMA instabilities; DOPPLER effect; NEUTRAL beams; PLASMA beam injection heating
- Publication
Plasma Physics Reports, 2024, Vol 50, Issue 7, p765
- ISSN
1063-780X
- Publication type
Article
- DOI
10.1134/S1063780X24600713