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Title: Reconstruction of equilibrium magnetic configurations in the Globus-M spherical tokamak

The results of reconstruction of equilibrium magnetic configurations in the Globus-M spherical tokamak by means of the EFIT code and by the method of movable filaments with the use of the data from magnetic measurements are compared. The EFIT code allows one to completely reconstruct the magnetic configuration by solving the Grad−Shafranov equation. In the method of movable filaments, the distribution of the toroidal current flowing through the plasma is described by a set of infinitely thin current-carrying rings. In this method, the last closed magnetic surface (LCMS) and the open surfaces lying beyond the LCMS are calculated. Using both methods, the coordinates of the regions where the separatrix strikes the divertor plates were determined. The results obtained agree well with the distributions of the temperature over the tungsten divertor tiles measured using an IR camera.
Authors:
; ;  [1] ; ; ;  [2] ; ; ; ; ;  [1]
  1. Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation)
  2. Efremov Research Institute of Electrophysical Apparatus (Russian Federation)
Publication Date:
OSTI Identifier:
22472015
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plasma Physics Reports; Journal Volume: 41; Journal Issue: 12; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CAMERAS; COMPARATIVE EVALUATIONS; DIVERTORS; E CODES; ELECTRIC CURRENTS; EQUILIBRIUM; GLOBUS-M SPHEROMAK; GRAD-SHAFRANOV EQUATION; MAGNETIC FIELD CONFIGURATIONS; MAGNETIC SURFACES; PLASMA; PLASMA FILAMENT; PLATES; SURFACES; TUNGSTEN