Identification of trapping finer-scale fluctuations in a solitary vortex in linear magnetized plasma
Résumé
The mutual interaction of drift wave-type modes and zonal flows causes the formation of higher-order nonlinear structures. This study focuses on the spatio-temporal behavior of these higher-order structures in a linear magnetized plasma. The structures include a solitary vortex, a long-lived circumnavigating motion localized both radially and azimuthally, and a short-lived packet of finer-scale fluctuations excited at the position of the solitary vortex. Observing the time evolution of the two-dimensional cross-sectional structures revealed that the packet of finer-scale fluctuations is trapped in the solitary vortex. The trapping times found are consistent with the theoretical evaluation.
Mots clés
magnetized plasma
zonal flow
solitary vortex
finer-scale fluctuations
higher-order nonlinear structure
two-dimensional cross-sectional structure
magnetized plasma Zonal flow solitary vortex finer-scale fluctuations higher-order nonlinear structure two-dimensional cross-sectional structure
Zonal flow
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