Characteristics of major plasma discharge disruption in the Globus-M spherical tokamak
- Authors: Sakharov N.V.1, Gusev V.K.1, Iblyaminova A.D.1, Kavin A.A.2, Kamenshchikov S.N.2, Kurskiev G.S.1, Lobanov K.M.2, Mineev A.B.2,3, Patrov M.I.1, Petrov Y.V.1, Tolstyakov S.Y.1
-
Affiliations:
- Ioffe Institute
- Efremov Institute of Electrophysical Apparatus
- St. Petersburg State University
- Issue: Vol 43, No 4 (2017)
- Pages: 422-432
- Section: Tokamaks
- URL: https://journals.rcsi.science/1063-780X/article/view/186565
- DOI: https://doi.org/10.1134/S1063780X17040110
- ID: 186565
Cite item
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.
About the authors
N. V. Sakharov
Ioffe Institute
Author for correspondence.
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
V. K. Gusev
Ioffe Institute
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
A. D. Iblyaminova
Ioffe Institute
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
A. A. Kavin
Efremov Institute of Electrophysical Apparatus
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 196641
S. N. Kamenshchikov
Efremov Institute of Electrophysical Apparatus
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 196641
G. S. Kurskiev
Ioffe Institute
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
K. M. Lobanov
Efremov Institute of Electrophysical Apparatus
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 196641
A. B. Mineev
Efremov Institute of Electrophysical Apparatus; St. Petersburg State University
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 196641; St. Petersburg, 199034
M. I. Patrov
Ioffe Institute
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
Yu. V. Petrov
Ioffe Institute
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021
S. Yu. Tolstyakov
Ioffe Institute
Email: nikolay.sakharov@mail.ioffe.ru
Russian Federation, St. Petersburg, 194021