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Chaotic behavior of resonant absorption in the microwave range

Published online by Cambridge University Press:  09 March 2009

B. Cros
Affiliation:
L.P.G.P., Université Paris XI, 91405 Orsay Cedex, France
A. Chiron
Affiliation:
L.P.G.P., Université Paris XI, 91405 Orsay Cedex, France
J. Godiot
Affiliation:
L.P.G.P., Université Paris XI, 91405 Orsay Cedex, France
G. Matthieussent
Affiliation:
L.P.G.P., Université Paris XI, 91405 Orsay Cedex, France
A. Héron
Affiliation:
C.P.T., Ecole polytechnique, 91128 Palaiseau, France

Abstract

The nonlinear evolution of electrostatic plasma waves excited by mode conversion is studied in an inhomogeneous, collisionless, unmagnetized plasma. Experiments in the microwave range (f = 3.5 GHz), performed in a plasma (ne ≃ 1011 cm−3) created in a multipolar discharge, show that the electrostatic plasma-wave evolution exhibits a transition from a nonlinear steady-state regime toward chaos, occurring when the pump field or the gradient length is increased. The Zakharov equations, which model the plasmawave evolution coupled with low-density perturbation, are solved numerically with parameters close to those of the experiment; this simulation allows a characterization of the two regimes.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1991

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References

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