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Re-ionization of a partially ionized plasma by an Alfvén wave of moderate amplitude

Published online by Cambridge University Press:  13 March 2009

M. H. Brennan  and
M. L. Sawley
M. H. Brennan
Affiliation:
School of Physical Sciences, The Flinders University of South Australia, Bedford Park, S.A. 5042
M. L. Sawley
Affiliation:
School of Physical Sciences, The Flinders University of South Australia, Bedford Park, S.A. 5042
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Abstract

This paper reports on the use of forced magneto-acoustic oscillations to investigate the effect of a torsional hydromagnetic (Alfvén) wave pulse of moderate amplitude on the properties of a partially ionized afterglow helium plasma. Observations of the magnetic flux associated with the oscillations, measured at a number of frequencies, are used to determine radial density proffles and to provide estimates of plasma temperature. The torsional wave is shown to cause significant re-ionization of the plasma with no corresponding increase in the plasma temperature. The torsional wave is shown to cause significant re-ionization of the plasma with no corresponding increase in the plasma temperature. However, the presence of a number of energetic particles is evidenced by the production of a significant number of doubly charged helium ions.

Type
Research Article
Information
Journal of Plasma Physics , Volume 24 , Issue 1 , August 1980 , pp. 65 - 74
Copyright
Copyright © Cambridge University Press 1980

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References

REFERENCES

Berger, E., Müller, G., Räuchle, E. & Schüller, P. G. 1975 Proceedings 7th European Conference on Controlled Fusion and Plasma Physics, Lausanne, vol. 1, p. 154.Google Scholar
Blackwell, B. D. & Cross, R. C. 1979 J. Plasma Phys. 22, 499.CrossRefGoogle Scholar
Brennan, M. H., Cheetham, A. D., Jones, I. R. & Sawley, M. L. 1978 a J. Plasma Phys. 19, 375.CrossRefGoogle Scholar
Brennan, M. H., Jessup, B. L. & Jones, I. R. 1977 J. Plasma Phys. 18, 127.CrossRefGoogle Scholar
Brennan, M. H., Jessup, B. L. & Jones, I. R. 1978 b Aust. J. Phys. 31, 477.CrossRefGoogle Scholar
Brennan, M. H. & Morrow, R. 1971 J. Phys. B, 4, L53.Google Scholar
Brown, I. G. & Watson-Munro, C. N. 1967 Plasma Phys. 9, 43.CrossRefGoogle Scholar
Cross, R. C. & Blackwell, B. D. 1978 Aust. J. Phys. 31, 61.CrossRefGoogle Scholar
Delcroix, J. L. 1965 Plasma Physics. Wiley.Google Scholar
Ferguson, A. F. & Moiseiwitsch, B. L. 1959 Proc. Phys. Soc. 74, 459.CrossRefGoogle Scholar
Frommelt, J. J. B. & Jones, I. R. 1975 J. Plasma Phys. 14, 373.CrossRefGoogle Scholar
Jessup, B. L. & Mccarthy, A. L. 1978 IEEE Trans. Plasma Sci. 6, 220.CrossRefGoogle Scholar
Mahadevan, P. & Magnuson, G. D. 1968 Phys. Rev. 171, 103.CrossRefGoogle Scholar
Spitzer, L. 1962 Physics of Fully Ionized Gases. Interscience.Google Scholar
Sy, W. N-C. 1978 Phys. Fluids, 21, 702.CrossRefGoogle Scholar
Zickert, D. W. & Schneider, H. 1969 Helv. Phys. Acta, 42, 871.Google Scholar