https://doi.org/10.1007/s100530050055
Dynamical study and control of drift waves in a magnetized laboratory plasma
1
Laboratoire PMIA (ESA 7040 du CNRS) , Université
Henri Poincaré, Nancy-I, B.P. 239, 54506 Vandœuvre-lès-Nancy Cedex, France
2
Turbulence Plasma (UMR 6633 du CNRS) , Université de Provence, 13397 Marseille
Cedex 20, France
Received:
31
March
1999
Revised:
5
August
1999
Published online: 15 March 2000
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.
PACS: 52.35.Kt – Drift waves / 52.35.Ra – Plasma turbulence / 05.45.-a – Nonlinear dynamics and nonlinear dynamical systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
