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

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3569841· OSTI ID:21537258

Fueloep, T; Moradi, S ^[1]

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1. Department of Applied Physics, Nuclear Engineering, Chalmers University of Technology and Euratom-VR Association, Goeteborg (Sweden)

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.

• OSTI ID: 21537258
• Journal Information: Physics of Plasmas, Vol. 18, Issue 3; Other Information: DOI: 10.1063/1.3569841; (c) 2011 American Institute of Physics; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

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