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Title: Characteristics of major plasma discharge disruption in the Globus-M spherical tokamak

Abstract

The characteristics of the major disruption of plasma discharges in the Globus-M spherical tokamak are analyzed. The process of current quench is accompanied by the loss of the vertical stability of the plasma column. The plasma boundary during the disruption is reconstructed using the algorithm of movable filaments. The plasma current decay is preceded by thermal quench, during which the profiles of the temperature and electron density were measured. The data on the time of disruption, the plasma current quench rate, and the toroidal current induced in the tokamak vessel are compared for hydrogen and deuterium plasmas. It is shown that the disruption characteristics depend weakly on the ion mass and the current induced in the vessel increases with the disruption time. The decay rate of the plasma toroidal magnetic flux during the disruption is determined using diamagnetic measurements. Such a decay is a source of the poloidal current induced in the vessel; it may also cause poloidal halo currents.

Authors:
;  [1]; ;  [2];  [1]; ;  [2]; ;  [1]
  1. Russian Academy of Sciences, Ioffe Institute (Russian Federation)
  2. Efremov Institute of Electrophysical Apparatus (Russian Federation)
Publication Date:
OSTI Identifier:
22760350
Resource Type:
Journal Article
Journal Name:
Plasma Physics Reports
Additional Journal Information:
Journal Volume: 43; Journal Issue: 4; Other Information: Copyright (c) 2017 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-780X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALGORITHMS; DEUTERIUM; ELECTRON DENSITY; FILAMENTS; HYDROGEN; MAGNETIC FLUX; PLASMA; SPHERICAL CONFIGURATION; TOKAMAK DEVICES

Citation Formats

Sakharov, N. V., E-mail: nikolay.sakharov@mail.ioffe.ru, Gusev, V. K., Iblyaminova, A. D., Kavin, A. A., Kamenshchikov, S. N., Kurskiev, G. S., Lobanov, K. M., Mineev, A. B., Patrov, M. I., E-mail: michael.patrov@mail.ioffe.ru, Petrov, Yu. V., and Tolstyakov, S. Yu. Characteristics of major plasma discharge disruption in the Globus-M spherical tokamak. United States: N. p., 2017. Web. doi:10.1134/S1063780X17040110.
Sakharov, N. V., E-mail: nikolay.sakharov@mail.ioffe.ru, Gusev, V. K., Iblyaminova, A. D., Kavin, A. A., Kamenshchikov, S. N., Kurskiev, G. S., Lobanov, K. M., Mineev, A. B., Patrov, M. I., E-mail: michael.patrov@mail.ioffe.ru, Petrov, Yu. V., & Tolstyakov, S. Yu. Characteristics of major plasma discharge disruption in the Globus-M spherical tokamak. United States. https://doi.org/10.1134/S1063780X17040110
Sakharov, N. V., E-mail: nikolay.sakharov@mail.ioffe.ru, Gusev, V. K., Iblyaminova, A. D., Kavin, A. A., Kamenshchikov, S. N., Kurskiev, G. S., Lobanov, K. M., Mineev, A. B., Patrov, M. I., E-mail: michael.patrov@mail.ioffe.ru, Petrov, Yu. V., and Tolstyakov, S. Yu. 2017. "Characteristics of major plasma discharge disruption in the Globus-M spherical tokamak". United States. https://doi.org/10.1134/S1063780X17040110.
@article{osti_22760350,
title = {Characteristics of major plasma discharge disruption in the Globus-M spherical tokamak},
author = {Sakharov, N. V., E-mail: nikolay.sakharov@mail.ioffe.ru and Gusev, V. K. and Iblyaminova, A. D. and Kavin, A. A. and Kamenshchikov, S. N. and Kurskiev, G. S. and Lobanov, K. M. and Mineev, A. B. and Patrov, M. I., E-mail: michael.patrov@mail.ioffe.ru and Petrov, Yu. V. and Tolstyakov, S. Yu.},
abstractNote = {The characteristics of the major disruption of plasma discharges in the Globus-M spherical tokamak are analyzed. The process of current quench is accompanied by the loss of the vertical stability of the plasma column. The plasma boundary during the disruption is reconstructed using the algorithm of movable filaments. The plasma current decay is preceded by thermal quench, during which the profiles of the temperature and electron density were measured. The data on the time of disruption, the plasma current quench rate, and the toroidal current induced in the tokamak vessel are compared for hydrogen and deuterium plasmas. It is shown that the disruption characteristics depend weakly on the ion mass and the current induced in the vessel increases with the disruption time. The decay rate of the plasma toroidal magnetic flux during the disruption is determined using diamagnetic measurements. Such a decay is a source of the poloidal current induced in the vessel; it may also cause poloidal halo currents.},
doi = {10.1134/S1063780X17040110},
url = {https://www.osti.gov/biblio/22760350}, journal = {Plasma Physics Reports},
issn = {1063-780X},
number = 4,
volume = 43,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2017},
month = {Sat Apr 15 00:00:00 EDT 2017}
}