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Observation of nonlinear effects in the propagation of m=0 torsional hydromagnetic waves

Published online by Cambridge University Press:  13 March 2009

M. H. Brennan
Affiliation:
School of Physical Sciences, The Flinders University of South Australia, Bedford Park, S.A. 5042, Australia
A. D. Cheetham
Affiliation:
School of Physical Sciences, The Flinders University of South Australia, Bedford Park, S.A. 5042, Australia
I. R. Jones
Affiliation:
School of Physical Sciences, The Flinders University of South Australia, Bedford Park, S.A. 5042, Australia
M. L. Sawley
Affiliation:
School of Physical Sciences, The Flinders University of South Australia, Bedford Park, S.A. 5042, Australia

Abstract

This paper reports on the observation of nonlinear effects in the propagation of axisymmetric (m = 0) torsional hydromagnetic waves in a partially ionized helium afterglow plasma. In accordance with the predictions of a weakly nonlinear theory, magnetic field perturbations oscillating at twice the frequency of the primary wave have been observed. Good quantitative agreement between the experimental data and theoretical calculations is obtained for moderate primary wave amplitudes.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1978

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References

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