Impurity transport due to electromagnetic drift wave turbulence

ORAL

Abstract

In the view of an increasing interest in high $\beta$ operation scenarios, such as hybrid scenarios for ITER the question of finite $\beta$ effects on the impurity transport is a critical issue due to possible fuel dilution and radiative cooling in the core. Here, electromagnetic effects at finite $\beta$ on impurity transport are studied through local linear gyro-kinetic simulations with {\sc gyro} [J.~Candy and E. Belli, General Atomics Report GA-A26818 (2011)]; in particular we investigate the parametric dependences of the impurity peaking factor (zero-flux density gradient) and the onset of the kinetic ballooning modes (KBM) and micro-tearing modes (MTM) in spherical (NSTX) and standard tokamaks (AUG and JET).

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Authors

  • Sara Moradi

    Chalmers University of Technology

  • Istvan Pusztai

    Chalmers University of Technology, Applied Phys., Chalmers Univ. of Technology, and Euratom-VR Association; Plasma Sci. and Fusion Center, Massachusetts Institute of Technology, Chalmers University of Technology and Euratom-VR Association

  • Albert Mollen

    Chalmers University of Technology, Applied Physics, Chalmers University of Technology, and Euratom-VR Association

  • T\"unde F\"ul\"op

    Chalmers University of Technology