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RAS PhysicsФизика плазмы Plasma Physics Reports

  • ISSN (Print) 0367-2921
  • ISSN (Online) 3034-6371

INFLUENCE OF DRIFTS AND CURRENTS ON THE MAIN OPERATING PARAMETERS OF THE TOKAMAK T-15MD DIVERTOR

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PII
S30346371S0367292125020015-1
DOI
10.7868/S3034637125020015
Publication type
Article
Status
Published
Authors
E. D. Marenkov
  • Affiliation:
    National Research Nuclear University “MEPhI
    National Research Centre “Kurchatov Institute
E. G. Kaveeva
  • Affiliation: Peter the Great St. Petersburg Polytechnic University
I. Yu. Senichenkov
  • Affiliation: Peter the Great St. Petersburg Polytechnic University
A. A. Pshenov
  • Affiliation: ITER
P. S. Semenov
  • Affiliation: National Research Centre “Kurchatov Institute
A. V. Gorbunov
  • Affiliation: National Research Centre “Kurchatov Institute
Volume/ Edition
Volume 51 / Issue number 2
Pages
117-132
Abstract
The work presents the results of the first calculations of the T-15MD tokamak near-wall plasma in the SOLPS-ITER code taking into account the effects of drifts and currents. The modes with the power passing through the separatrix PSOL = 6 MW and different H gas puff intensities, corresponding to the average electron density on the separatrix, nesep = (2–4.5)·1019 m−3, are considered. The same as in other tokamaks of similar size, E × B drift leads to the flow of hydrogen from the outer divertor to the inner one, which changes the load distribution between the divertor targets. Drifts also affect the flow of the carbon impurity. As a rule, when describing the dependence on the H gas puff, either n esep or the total amount of hydrogen in the scrape off layer (SOL), Ntot, is used as a parameter characterizing the discharge. In this case, these quantities are considered as equivalent plasma characteristics in the SOL. It is shown that, from the point of view of estimating the influence of drifts, these quantities are not equivalent: the dependence of some divertor parameters on nesep does not change with the inclusion of drifts, but the dependence on Ntot can change. It is also seen that drifts lead to a more pronounced maximum in the dependence of the saturation current on the electron density, Isat(nesep). This is explained by changes in the emission of the carbon impurity and the power of the recombination source of hydrogen in the divertor.
Keywords
пристеночная плазма токамак SOLPS моделирование детачмент Т-15МД дрейфы дивертор углерод
Date of publication
20.01.2025
Year of publication
2025
Number of purchasers
0
Views
25

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