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A demonstration of Alfvén waves Part 1. Generation of standing waves

Published online by Cambridge University Press:  28 March 2006

Antony Jameson
Antony Jameson
Affiliation:
Trinity Hall, Cambridge
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Abstract

In this paper the equations for Alfvén waves are examined and conditions necessary for the occurrence of resonance are determined. An experiment using liquid sodium inside a torus is described. Waves were generated by means of alternating current supplied to a coil around the torus. A strong resonance was observed at the fundamental frequency, and a weak resonance at three times this frequency. At the fundamental resonance the alternating magnetic field attained magnitudes more than 9 times the magnitude of the field that would have been generated in free space by the exciting current. The results were in good agreement with prediction.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 19 , Issue 4 , August 1964 , pp. 513 - 527
Copyright
© 1964 Cambridge University Press

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References

Lehnert, B. 1954 Phys. Rev. 94, 815.
Lundquist, S. 1949 Phys. Rev. 76, 1805.