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. 56 12 124005- 124005Driving Forces
Sustainable development
Areas of Advance
Energy
Roots
Basic sciences
Subject Categories (SSIF 2011)
Fusion, Plasma and Space Physics
DOI
10.1088/0741-3335/56/12/124005