Nonlinear Phenomena in Microphysics of Collisionless Plasmas. Application to Space and Laboratory Plasmas
J. Phys. IV France 05 (1995) C6-71-C6-74
Dynamical Behaviour of a Plasma Discharge in the Current Regime Limited by the Cathode TemperatureC. Arnas Capeau1, 2, G. Bachet1, 2 and F. Doveil1, 2
1 Institut Méditerranéen de Technologie, Technopôle de Château-Gombert, 13451 Marseille cedex 20, France
2 Equipe Turbulence Plasma de l'URA 773 du CNRS, Univ. de Provence
Experimental observations of plasma self-oscillations are presented. In the current regime limited by the cathode temperature of a continuous multipolar discharge, they appear for low gas pressure (collisionless plasma), low cathode heating current and above a discharge voltage threshold. Their frequency and amplitude are strongly dependent on the discharge parameters. The scaling laws of their variation and an example of a period-doubling route to chaos are reported.
© EDP Sciences 1995