Analysis of Dynamics of Plasma Current Quench in the Globus-M Spherical Tokamak

Journal Article · Sun Apr 15 00:00:00 EDT 2018 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X18040062· OSTI ID:22763285

Gusev, V. K. ^[1]; Kavin, A. A.; Kamenshchikov, S. N.; Lobanov, K. M.; Mineev, A. B. ^[2]; Petrov, Yu. V. ^[1]

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1. Ioffe Institute (Russian Federation)
2. Efremov Institute of Electrophysical Apparatus (Russian Federation)

Data on the dynamics of the plasma current quench in the Globus-M tokamak are presented. The main current quench characteristics at different toroidal magnetic fields are compared. The distribution of the toroidal current induced in the vessel wall is determined from magnetic measurements, and the electromagnetic loads acting on the vessel wall during the current quench are calculated. By extrapolating the experimental data, the additional pressure on the vessel wall during the current quench in the upgraded Globus-M2 tokamak is estimated. It is shown that the current quench results in the appearance of bending stresses in the vessel domes. Using numerical simulations, it is shown that the best agreement between the measured and calculated plasma current dynamics during the current quench corresponds to the linear (in time) influx of the carbon impurity.

• OSTI ID: 22763285
• Journal Information: Plasma Physics Reports, Vol. 44, Issue 4; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CARBON
COMPUTERIZED SIMULATION
ELECTRIC CURRENTS
SPHERICAL CONFIGURATION
TOKAMAK DEVICES