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Neoclassical impurity flux in presence of turbulent generated poloidal asymmetries and pressure anisotropy

Abstract : Poloidal asymmetries of impurities are commonly observed experimentally. Density asymmetry is already known to impact significantly neoclassical prediction of impurity flux. In this article, the effect of impurity pressure asymmetry and anisotropy on the neoclassical flux of impurity is derived analytically. This prediction is compared with results coming from a simulation performed with the gyrokinetic code GYSELA, featuring both turbulent and neoclassical transports. A fair agreement is found between the analytical prediction and the result of the simulation. On the special case which is considered, the effect of impurity pressure asymmetry and anisotropy are shown to play a predominant role on the neoclassical impurity transport.
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https://hal.archives-ouvertes.fr/hal-01895667
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Submitted on : Monday, October 15, 2018 - 2:15:39 PM
Last modification on : Tuesday, April 19, 2022 - 3:54:02 PM
Long-term archiving on: : Wednesday, January 16, 2019 - 2:54:11 PM

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P. Donnel, X. Garbet, Y. Sarazin, V. Grandgirard, N Bouzat, et al.. Neoclassical impurity flux in presence of turbulent generated poloidal asymmetries and pressure anisotropy. Plasma Physics and Controlled Fusion, IOP Publishing, In press. ⟨hal-01895667⟩

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