Experimental Electron Temperature Gradient Dependence of Heavy Impurity Transport in Fusion Devices

Journal Article · Fri Jul 16 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.035002· OSTI ID:21410920

Villegas, D; Guirlet, R; Bourdelle, C; Hoang, G T; Garbet, X; Sabot, R ^[1]

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1. CEA, IRFM, F-13108 Saint-Paul-lez-Durance (France)

The turbulent impurity (nickel) transport dependence on the normalized electron temperature gradient has been analyzed in sawtooth-free electron cyclotron wave heated Tore Supra plasmas. In the core, our experimental analysis shows that the lower R/L{sub T{sub e}}, the lower the nickel diffusion coefficient. The latter decreases until the instability threshold is reached. The experimental threshold is in agreement with the one computed by a gyrokinetic model. Further out, R/L{sub T{sub e}} plays no role in the impurity diffusion. This set of experimental results is consistent with a quasilinear gyrokinetic analysis.

• OSTI ID: 21410920
• Journal Information: Physical Review Letters, Vol. 105, Issue 3; Other Information: DOI: 10.1103/PhysRevLett.105.035002; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CYCLOTRONS
DIFFUSION
ELECTRON TEMPERATURE
NICKEL
PLASMA
PLASMA IMPURITIES
PLASMA INSTABILITY
SAWTOOTH OSCILLATIONS
TEMPERATURE GRADIENTS
TORE SUPRA TOKAMAK
ACCELERATORS
CLOSED PLASMA DEVICES
CYCLIC ACCELERATORS
ELEMENTS
IMPURITIES
INSTABILITY
METALS
OSCILLATIONS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSITION ELEMENTS