Original scientific paper

Spatial evolution of nonlinearly coupled ion-acoustic waves

M. Čerček ; University of Ljubljana and Institute J. Stefan, Ljubljana
R. Tavzes ; University of Ljubljana and Institute J. Stefan, Ljubljana

Abstract

Investigation of the spatial evolution of nonlinearly coupled ion-acoustic waves propagating along a weakly collisional ECR plasma column in a magnetic field is reported. An ion-acoustic wave of frequency f1 or two waves of different frequencies f1 and f2 are launched by applying a sinusoidal voltage to a grid immersed in the plasma. An axially movable grid is used in determination of the damping and phase velocity of f1 , f2 and nonlinearly generated 2f 1 and f 1 - f2 waves. The measured spatial growth and decay are qualitatively in accordance with those obtained by nonlinear fluid theory of ion wave propagation.

Keywords

Hrčak ID:

322942

URI

https://hrcak.srce.hr/322942

Publication date:

6.1.1976.

Article data in other languages: slovenian

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