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Pisma v Zhurnal Tekhnicheskoi Fiziki, 2020, Volume 46, Issue 23, Pages 3–7
DOI: https://doi.org/10.21883/PJTF.2020.23.50338.18450 (Mi pjtf4916) 		 
This article is cited in 9 scientific papers (total in 9 papers)

First observations of Alfvén cascades on the Globus-M2 tokamak and their application for minimal safety factor value analysis

I. M. Balachenkovab, Yu. V. Petrova, V. K. Guseva, N. N. Bakhareva, V. V. Bulaninab, V. I. Varfolomeeva, N. S. Zhil'tsovab, E. O. Kiselevab, G. S. Kurskieva, V. B. Minaeva, M. I. Patrova, A. V. Petrovb, A. M. Ponomarenkob, N. V. Sakharova, A. Yu. Telnovaa, V. A. Tokareva, N. A. Khromova, P. B. Shchegoleva, A. Yu. Yashina

a Ioffe Institute, St. Petersburg
b Peter the Great St. Petersburg Polytechnic University
Full-text PDF (208 kB) Citations (9)
DOI: https://doi.org/10.21883/PJTF.2020.23.50338.18450
Abstract: On the spherical tokamak Globus-M2 in discharges with toroidal magnetic field of 0.7 T by means of magnetic probes and a number of other diagnostics during neutral beam injection at the current ramp up stage, magnetic field oscillations in the range of 100 – 300 kHz having their frequency increasing in time, had been observed. Eigenmodes with wavenumbers $n$ = 1 – 3 and $m$ = 2 – 4 were being registered. These oscillations were identified as Alfvén cascades. By means of multi-channel fluctuation reflectometer, observed eigenmodes were found to be localized near the magnetic shear reversal radius. Application of MHD-spectroscopy technique allowed us to determine safety factor temporal evolution and experimental values are in well agreement with modelling results, provided by ASTRA transport code.
Keywords: tokamak, magnetic diagnostics, Alfvén cascades, safety factor, reflectometer.
Funding agency Grant number
Ministry of Education and Science of the Russian Federation RFMEFI62119X0021
Russian Science Foundation 17-12-01177-П
The experiments were carried out on the Unique Scientific Facility Spherical Tokamak Globus-M, which is incorporated in the Federal Joint Research Center Material science and characterization in advanced technology (project ID RFMEFI62119X0021). Routine measurements of the basic plasma parameters were performed within the framework of the State task of the Ministry of Science and Higher Education of the Russian Federation. The reflectometry measurements for the spatial localization of Alfvén cascades, magnetic measurements, and safety factor calculation by ASTRA code were financially supported by Russian Science Foundation (grant 17-12-01177 extension).
Received: 02.07.2020
Revised: 24.07.2020
Accepted: 06.08.2020
English version:
Technical Physics Letters, 2020, Volume 46, Issue 12, Pages 1157–1161
DOI: https://doi.org/10.1134/S1063785020120032
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: I. M. Balachenkov, Yu. V. Petrov, V. K. Gusev, N. N. Bakharev, V. V. Bulanin, V. I. Varfolomeev, N. S. Zhil'tsov, E. O. Kiselev, G. S. Kurskiev, V. B. Minaev, M. I. Patrov, A. V. Petrov, A. M. Ponomarenko, N. V. Sakharov, A. Yu. Telnova, V. A. Tokarev, N. A. Khromov, P. B. Shchegolev, A. Yu. Yashin, “First observations of Alfvén cascades on the Globus-M2 tokamak and their application for minimal safety factor value analysis”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 46:23 (2020), 3–7; Tech. Phys. Lett., 46:12 (2020), 1157–1161
Citation in format AMSBIB
\Bibitem{BalPetGus20}
\by I.~M.~Balachenkov, Yu.~V.~Petrov, V.~K.~Gusev, N.~N.~Bakharev, V.~V.~Bulanin, V.~I.~Varfolomeev, N.~S.~Zhil'tsov, E.~O.~Kiselev, G.~S.~Kurskiev, V.~B.~Minaev, M.~I.~Patrov, A.~V.~Petrov, A.~M.~Ponomarenko, N.~V.~Sakharov, A.~Yu.~Telnova, V.~A.~Tokarev, N.~A.~Khromov, P.~B.~Shchegolev, A.~Yu.~Yashin
\paper First observations of Alfv\'en cascades on the Globus-M2 tokamak and their application for minimal safety factor value analysis
\jour Pisma v Zhurnal Tekhnicheskoi Fiziki
\yr 2020
\vol 46
\issue 23
\pages 3--7
\mathnet{http://mi.mathnet.ru/pjtf4916}
\crossref{https://doi.org/10.21883/PJTF.2020.23.50338.18450}
\elib{https://elibrary.ru/item.asp?id=44574063}
\transl
\jour Tech. Phys. Lett.
\yr 2020
\vol 46
\issue 12
\pages 1157--1161
\crossref{https://doi.org/10.1134/S1063785020120032}
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    • This publication is cited in the following 9 articles:
    Citing articles in Google Scholar: Russian citations, English citations
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