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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:46 |
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Conference: Bucharest University Faculty of Physics 2022 Meeting
Section: Theoretical Physics and Applied Mathematics
Title:
Transport of low-Z impurities in the presence of drift-type turbulence in tokamak plasmas
Authors:
Dragos Iustin PALADE
Affiliation:
Faculty of Physics, University of Bucharest
E-mail
dragos.i.palade@gmail.com
Keywords:
tokamak, turbulence, impurity
Abstract:
Impurities are an important component of nowadays tokamak plasmas. Their presence at the center of the reactor can have detrimental effects on the burning reaction and, for that reason, one must understand and control their transport. The dynamics of low-Z impurities is dominated by the Ion-Temperature-Gradient and Trapped-Electron-Mode turbulence. In this work, we investigate how the drift-type features of these instabilities affect the transport of impurities. The problem is tackled both from an analytical and a numerical perspective. Quasi-linear analytical estimations are found for the convective motion. The behavior is confirmed with the use of direct numerical simulations. Quantitative dependencies between transport coefficients and plasma parameters are evaluated numerically.
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