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Published on: July 19, 2016
Turbulent saturation of tokamak-core zonal flows
1Centre for Interdisciplinary Plasma Science, Max-Planck Institut für Plasmaphysik, EURATOM-IPP Association, D-85748 Garching, Germany.
Abstract:
Current theories of zonal flow dynamics focus on the transport of poloidal momentum. Different from a cylinder, stationary poloidal flows in a tokamak are accompanied by (possibly kinetic) flows along the magnetic field, which maintain incompressibility, and comprise the major part of the flow energy. In numerical turbulence studies, the flows saturate by the turbulent diffusion of the parallel flow, whereas the poloidal momentum transport continues to strongly drive the flows.
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