Fluid simulations of turbulent impurity transport

Journal Article · Sun Apr 15 00:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2710461· OSTI ID:20974922

Dubuit, N; Garbet, X; Parisot, T; Guirlet, R; Bourdelle, C ^[1]

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1. Association Euratom-CEA, CEA/DSM/DRFC, Centre de Cadarache, 13108 Saint-Paul-Lez-Durance (France)

Impurity transport in tokamak plasmas is studied with a fluid turbulence code, which has been upgraded to implement two ion species and electrons. The (fixed-flux) simulations are compared to the predictions of a quasilinear model. These simulations mostly agree with quasilinear estimates; they indicate that a turbulent impurity pinch exists. Moreover, this pinch is found to be dominated by curvature terms, as thermodiffusion pinches are found to decrease as 1/Z and observed parallel velocity effects remain weak. The sign of the pinch is also investigated.

• OSTI ID: 20974922
• Journal Information: Physics of Plasmas, Vol. 14, Issue 4; Other Information: DOI: 10.1063/1.2710461; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRONS
FORECASTING
IONS
PINCH EFFECT
PLASMA
PLASMA CONFINEMENT
PLASMA IMPURITIES
PLASMA SIMULATION
THERMAL DIFFUSION
TOKAMAK DEVICES
TURBULENCE