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.
Similar content being viewed by others
References
T. O’Gorman, K. J. Gibson, J. A. Snapeet, et al., Nucl. Fusion 54, 082002 (2014).
V. K. Gusev, V. E. Golant, E. Z. Gusakov, et al., Tech. Phys. 44, 1054 (1999).
D. A. Gates et al., Nucl. Fusion 37 (11), 1 (1997).
Yu. V. Petrov, S. E. Bender, V. K. Gusev, et al., in Proceedings of the 30th EPS Conference on Controlled Fusion and Plasma Physics, St. Petersburg, July 7–11, 2003, ECA 27A, 3.109 (2003).
M. I. Patrov, S. E. Bender, V. K. Gusev, D. E. Kravtsov, I. A. Mironov, Yu. V. Petrov, and A. V. Sushkov, Plasma Phys. Rep. 33, 81 (2007).
L. L. Lao et al., Nucl. Fusion 25 (1985).
S. V. Mirnov, Physical Processes in a Tokamak Plasma (Energoatomizdat, Moscow, 1985) [in Russian].
V. K. Gusev, S. Yu. Tolstyakov, V. I. Varfolomeev, et al., Vopr. At. Nauki Tekh., Ser.: Termoyad. Sintez, No. 1, 39 (2007).
N. A. Kirneva, Recent Studies on Tokamaks (MIFI, Moscow, 2008) [in Russian].
B. N. Kuvshinov and A. B. Mikhailovskii, Plasma Phys. Rep. 24, 145 (1998).
A. H. Glasser, J. M. Greene, and J. L. Johnson, Phys. Fluids 18, 875 (1975).
J. P. Meskat, H. Zohm, G. Gantenbeinye, et al., Plasma Phys. Control. Fusion 43, 1325 (2001).
Author information
Authors and Affiliations
Corresponding authors
Additional information
Original Russian Text © A.V. Dudkovskaya, M.I. Patrov, V.K. Gusev, G.S. Kurskiev, Yu.V. Petrov, 2017, published in Voprosy Atomnoi Nauki i Tekhniki, Seriya: Termoyadernyi Sintez, 2017, Vol. 40, No. 4, pp. 63–67.
Rights and permissions
About this article
Cite this article
Dudkovskaya, A.V., Patrov, M.I., Gusev, V.K. et al. Tearing Mode Behavior in the Globus-M Spherical Tokamak Plasma. Phys. Atom. Nuclei 81, 1033–1036 (2018). https://doi.org/10.1134/S1063778818070025
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063778818070025