Ion transport barriers triggered by plasma polarization in gyrokinetic simulations - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Plasma Physics and Controlled Fusion Year : 2013

Ion transport barriers triggered by plasma polarization in gyrokinetic simulations

Abstract

The creation of ion transport barriers by externally induced sheared E × B flows is investigated with the global, full-f and flux-driven gyrokinetic code GYSELA. A gyrokinetic source of vorticity is designed and proves to be efficient in polarizing the plasma. Induced sheared electric fields develop in the turbulent core and are accompanied by the creation of a transport barrier. The barrier and the sheared flow relax quasi-periodically because of zonal flow activity and a destabilizing temperature anisotropy induced by the vorticity source. A new cyclic mechanism leading to the relaxation of transport barriers in tokamaks is discovered.
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Dates and versions

insu-03621009 , version 1 (27-03-2022)

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A. Strugarek, Y. Sarazin, D. Zarzoso, J. Abiteboul, A. S. Brun, et al.. Ion transport barriers triggered by plasma polarization in gyrokinetic simulations. Plasma Physics and Controlled Fusion, 2013, 55, ⟨10.1088/0741-3335/55/7/074013⟩. ⟨insu-03621009⟩
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