Localization of the eigenmode of the drift-resistive plasma by zonal flow
The mode structure of the linearly growing mode in the resistive-drift plasma is studied by the Hasegawa-Wakatani model with a sinusoidally forced zonal flow V. The parallel compression by the resistive current and the particle transport may drive the perturbations unstable. The linearly growing eig...
Gespeichert in:
Veröffentlicht in: | Physics of plasmas 2018-10, Vol.25 (10) |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | The mode structure of the linearly growing mode in the resistive-drift plasma is studied by the Hasegawa-Wakatani model with a sinusoidally forced zonal flow V. The parallel compression by the resistive current and the particle transport may drive the perturbations unstable. The linearly growing eigenstate characteristically maintains a positive phase difference between the electric potential and the generalized potential vorticity. The profile of the most unstable mode exhibits an asymmetry regarding the zonal flow: It is found that the mode is localized around where V is fast, thereby large curvature of V, in the direction of the electron diamagnetic drift. |
---|---|
ISSN: | 1070-664X 1089-7674 |
DOI: | 10.1063/1.5048952 |