Impurity transport in Alcator C-Mod in the presence of poloidal density variation induced by ion cyclotron resonance heating
Journal article, 2014

Impurity particle transport in an ion cyclotron resonance heated Alcator C-Mod discharge is studied with local gyrokinetic simulations and a theoretical model including the effect of poloidal asymmetries and elongation. In spite of the strong minority temperature anisotropy in the deep core region, the poloidal asymmetries are found to have a negligible effect on the turbulent impurity transport due to low magnetic shear in this region, in agreement with the experimental observations. According to the theoretical model, in outer core regions poloidal asymmetries may contribute to the reduction of the impurity peaking, but uncertainties in atomic physics processes prevent quantitative comparison with experiments.

poloidal asymmetries

fusion

ion cyclotron resonance heating

Alcator C-Mod

impurity transport

Author

Albert Mollén

Chalmers, Applied Physics, Nuclear Engineering

Istvan Pusztai

Chalmers, Applied Physics, Nuclear Engineering

M. Reinke

Massachusetts Institute of Technology (MIT)

University of York

Yevgen Kazakov

Royal Military Academy

Nathan T. Howard

Massachusetts Institute of Technology (MIT)

E Belli

General Atomics

Tünde Fülöp

Chalmers, Applied Physics, Nuclear Engineering

Plasma Physics and Controlled Fusion

0741-3335 (ISSN) 1361-6587 (eISSN)

Vol. 2014 56 124005-

Driving Forces

Sustainable development

Areas of Advance

Energy

Roots

Basic sciences

Subject Categories

Fusion, Plasma and Space Physics

DOI

10.1088/0741-3335/56/12/124005

More information

Latest update

4/30/2018