Autoresonant control of drift waves

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Abstract

The control of nonlinear drift waves in a magnetized plasmas column has been investigated. The studies are based on the Hasegawa–Mima model, which is solved on a disk domain with radial inhomogeneity of the plasma density. The system is forced by a rotating potential with varying frequency defined on the boundary. To excite and control the waves we apply the autoresonant effect, taking place when the amplitude of the forcing exceeds a threshold value and the waves are phase-locked with the forcing. We demonstrate that the autoresonant approach is applicable for excitation of a range of steady nonlinear waves of the lowest azimuthal mode numbers and for controlling their amplitudes and phases. We also demonstrate the excitation of zonal flows (m = 0 modes), which are controlled via the forced modes.
Original languageEnglish
Article number034001
JournalPhysica Scripta
Volume92
Issue number3
Number of pages9
ISSN0031-8949
DOIs
Publication statusPublished - 2017

Keywords

  • Autoresonance
  • Drift waves
  • Rossby waves
  • Flow control

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