Turbulent and neoclassical impurity transport in tokamak plasmas
Journal article, 2009

Impurity particle transport in tokamaks is studied using an electrostatic fluid model for main ion and impurity temperature gradient (ITG)͒ mode and trapped electron (TE͒) mode turbulence in the collisionless limit and neoclassical theory. The impurity flux and impurity density peaking factor obtained from a self-consistent treatment of impurity transport are compared and contrasted with the results of the often used trace impurity approximation. Comparisons between trace and self-consistent turbulent impurity transport are performed for ITER-like profiles. It is shown that for small impurity concentrations the trace impurity limit is adequate if the plasma is dominated by ITG turbulence. However, in case of TE mode dominated plasmas the contribution from impurity modes may be significant, and therefore a self-consistent treatment may be needed.


Tünde Fülöp

Chalmers, Applied Physics, Nuclear Engineering

Hans Nordman

Chalmers, Department of Radio and Space Science, Transport Theory

Physics of Plasmas

1070-664X (ISSN) 1089-7674 (eISSN)

Vol. 16 3 032306-

Driving Forces

Sustainable development

Areas of Advance



Basic sciences

Subject Categories

Fusion, Plasma and Space Physics

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