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Hall current effects on tearing modes in rotating reverse field plasmas

Published online by Cambridge University Press:  13 March 2009

Jay Kappraff ,
William Grossman  and
Michael Kress
Jay Kappraff
Affiliation:
New Jersey Institute of Technology, Newark, New Jersey
William Grossman
Affiliation:
New York University, Courant Institute of Mathematical Sciences, New York, New York 10003
Michael Kress
Affiliation:
New York University, Courant Institute of Mathematical Sciences, New York, New York 10003
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Abstract

It has been experimentally observed for some time that certain tearing modes in plasmas may be suppressed if the plasma rotates in a preferred direction. In this paper we treat the m = 0, finite-wavelength tearing mode in cylindrical geometry for a reversed-field plasma equilibrium and show that by generalizing Ohm's law to include Hall current terms, we are able to explain this effect of rotation on tearing modes. Our results agree qualitatively with earlier analysis and numerical simulations. We also show that our results are sensitive to the position of the outer conducting wall, and for wall positions sufficiently close to the plasma-vacuum interface, tearing modes may be quenched when the rotation reaches a critical value. These results follow from a boundary-layer analysis and numerical integration of the boundary-layer equations.

Type
Research Article
Information
Journal of Plasma Physics , Volume 25 , Issue 1 , February 1981 , pp. 111 - 131
Copyright
Copyright © Cambridge University Press 1981

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References

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