# How eigenmode self-interaction affects zonal flows and convergence of tokamak core turbulence with toroidal system size

@article{CJ2020HowES,
title={How eigenmode self-interaction affects zonal flows and convergence of tokamak core turbulence with toroidal system size},
author={Ajay C. J. and Stephan Brunner and Ben F. McMillan and Justin Ball and Julien Dominski and Gabriele Merlo},
journal={Journal of Plasma Physics},
year={2020},
volume={86}
}
• Published 6 May 2020
• Physics
• Journal of Plasma Physics
Self-interaction is the process by which a microinstability eigenmode that is extended along the direction parallel to the magnetic field interacts non-linearly with itself. This effect is particularly significant in gyrokinetic simulations accounting for kinetic passing electron dynamics and is known to generate stationary $E\times B$ zonal flow shear layers at radial locations near low-order mode rational surfaces (Weikl et al. Phys. Plasmas, vol. 25, 2018, 072305). We find that self…
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