Journal article
Autoresonant control of drift waves
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.
Language: | English |
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Year: | 2017 |
Pages: | 034001 |
ISSN: | 00318949 and 14024896 |
Types: | Journal article |
DOI: | 10.1088/1402-4896/aa5897 |
ORCIDs: | Rasmussen, Jens Juul and Naulin, Volker |