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Title: Effect of poloidal asymmetry on the impurity density profile in tokamak plasmas

Abstract

The effect of poloidal asymmetry of impurities on impurity transport driven by electrostatic turbulence in tokamak plasmas is analyzed. It is found that if the density of the impurity ions is poloidally asymmetric then the zero-flux impurity density gradient is significantly reduced and even a sign change in the impurity flux may occur if the asymmetry is sufficiently large. This effect is most effective in low shear plasmas with the impurity density peaking on the inboard side and may be a contributing factor to the observed outward convection of impurities in the presence of radio frequency heating.

Authors:
;  [1]
  1. Department of Applied Physics, Nuclear Engineering, Chalmers University of Technology and Euratom-VR Association, Goeteborg (Sweden)
Publication Date:
OSTI Identifier:
21537258
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 18; Journal Issue: 3; Other Information: DOI: 10.1063/1.3569841; (c) 2011 American Institute of Physics; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASYMMETRY; DENSITY; HIGH-FREQUENCY HEATING; PLASMA; PLASMA IMPURITIES; TOKAMAK DEVICES; TURBULENCE; CLOSED PLASMA DEVICES; HEATING; IMPURITIES; PHYSICAL PROPERTIES; PLASMA HEATING; THERMONUCLEAR DEVICES

Citation Formats

Fueloep, T, and Moradi, S. Effect of poloidal asymmetry on the impurity density profile in tokamak plasmas. United States: N. p., 2011. Web. doi:10.1063/1.3569841.
Fueloep, T, & Moradi, S. Effect of poloidal asymmetry on the impurity density profile in tokamak plasmas. United States. https://doi.org/10.1063/1.3569841
Fueloep, T, and Moradi, S. 2011. "Effect of poloidal asymmetry on the impurity density profile in tokamak plasmas". United States. https://doi.org/10.1063/1.3569841.
@article{osti_21537258,
title = {Effect of poloidal asymmetry on the impurity density profile in tokamak plasmas},
author = {Fueloep, T and Moradi, S},
abstractNote = {The effect of poloidal asymmetry of impurities on impurity transport driven by electrostatic turbulence in tokamak plasmas is analyzed. It is found that if the density of the impurity ions is poloidally asymmetric then the zero-flux impurity density gradient is significantly reduced and even a sign change in the impurity flux may occur if the asymmetry is sufficiently large. This effect is most effective in low shear plasmas with the impurity density peaking on the inboard side and may be a contributing factor to the observed outward convection of impurities in the presence of radio frequency heating.},
doi = {10.1063/1.3569841},
url = {https://www.osti.gov/biblio/21537258}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 3,
volume = 18,
place = {United States},
year = {Tue Mar 15 00:00:00 EDT 2011},
month = {Tue Mar 15 00:00:00 EDT 2011}
}