Abstract
The various dynamical regimes of collisional drift waves in a magnetized plasma column are experimentally studied. These unstable low-frequency electrostatic waves are related with strong modulations of the ion and electron density. The angular velocity of the rotating plasma column is the control parameter of the dynamics: regular, chaotic and turbulent regimes are obtained. The spatial extension of the system allows for the occurrence of spatiotemporal chaos. The time-delay auto-synchronization method of controlling chaos [K. Pyragas, Phys. Lett. A 170, 421 (1992)] though purely temporal is successfully applied. A numerical study using coupled nonlinear oscillators exhibiting chaos is compared to the experimental results. The control method is tested on this model.
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ESA 7040 du CNRS
UMR 6633 du CNRS
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Gravier, E., Caron, X., Bonhomme, G. et al. Dynamical study and control of drift waves in a magnetized laboratory plasma. Eur. Phys. J. D 8, 451–457 (2000). https://doi.org/10.1007/s100530050055
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DOI: https://doi.org/10.1007/s100530050055