Comparison of local and global gyrokinetic calculations of collisionless zonal flow damping in quasi-symmetric stellarators
J. Smoniewski,
E. Sánchez,
I. Calvo
et al.
Abstract:The linear collisionless damping of zonal flows is calculated for quasi-symmetric stellarator equilibria in flux-tube, flux-surface, and full-volume geometry. Equilibria are studied from the quasihelical symmetry configuration of the Helically Symmetric eXperiment (HSX), a broken symmetry configuration of HSX, and the quasi-axial symmetry geometry of the National Compact Stellarator eXperiment (NCSX). Zonal flow oscillations and long-time damping affect the zonal flow evolution, and the zonal flow residual goe… Show more
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