Tearing Mode Behavior in the Globus-M Spherical Tokamak Plasma
- Authors: Dudkovskaya A.V.1, Patrov M.I.1, Gusev V.K.1, Kurskiev G.S.1, Petrov Y.V.1
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Affiliations:
- Ioffe Physical-Technical Institute
- Issue: Vol 81, No 7 (2018)
- Pages: 1033-1036
- Section: Article
- URL: https://journal-vniispk.ru/1063-7788/article/view/193718
- DOI: https://doi.org/10.1134/S1063778818070025
- ID: 193718
Cite item
Abstract
The 2/1 tearing mode instability during the plateau phase of the plasma current time evolution has been observed since the start of the Globus-M spherical tokamak operation. Because of a small amount of shots in a database, the poloidal beta dependence of the instability growth rate had been investigated with an insufficient accuracy. In this work, a more detailed analysis has been produced that proves the fact that the observed modes can be treated as neoclassical. The saturated island width as a function of poloidal beta has been obtained; a time evolution of the magnetic island has been calculated from the Mirnov magnetic coil signals and compared to the modified Rutherford theory, and the critical magnetic island width has been found for the neoclassical tearing mode (NTM) of the Globus-M tokamak.
Keywords
About the authors
A. V. Dudkovskaya
Ioffe Physical-Technical Institute
Author for correspondence.
Email: Dudkovskaya@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
M. I. Patrov
Ioffe Physical-Technical Institute
Author for correspondence.
Email: michael.patrov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
V. K. Gusev
Ioffe Physical-Technical Institute
Email: gleb.kurskiev@gmail.com
Russian Federation, St. Petersburg, 194021
G. S. Kurskiev
Ioffe Physical-Technical Institute
Author for correspondence.
Email: gleb.kurskiev@gmail.com
Russian Federation, St. Petersburg, 194021
Yu. V. Petrov
Ioffe Physical-Technical Institute
Email: gleb.kurskiev@gmail.com
Russian Federation, St. Petersburg, 194021
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