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This overview is an assessment of the gyrokinetic framework and simulations to compute turbulent transport in fusion plasmas. It covers an introduction to the gyrokinetic theory, the principal numerical techniques which are being used to solve the gyrokinetic equations, fundamentals in gyrokinetic turbulence and the main results which have been brought by simulations with regard to transport in fusion devices and fluctuation measurements.
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Paolo Angelino, Alberto Bottino, Sébastien Jolliet, Ben McMillan, Trach-Minh Tran, Laurent Villard
mode-switching'' approach consisting in using an effective heat source computed from a gradient-driven simulation as an input for the flux-driven run is also tested and consistent results are obtained between gradient-driven, flux-driven, and
mode-switched'' simulations. Finally, the
heat source is characterized, along with variations, using a 2D phase-space diagnostics. It is shown
that in some cases, the use of this fixed heat source can lead to a sampling problem causing an
artificial source/sink of moments.Emiliano Fable, Mikhail Maslov, Henri Weisen