Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-26T01:34:34.985Z Has data issue: false hasContentIssue false
  • English
  • Français

Tearing-mode stability in a cylindrical plasma with equilibrium flows

Published online by Cambridge University Press:  13 March 2009

K. P. Wessen  and
M. Persson
K. P. Wessen
Affiliation:
Department of Theoretical Physics and Plasma Research Laboratory, Research School of Physical Sciences, The Australian National University, G.P.O. Box 4, Canberra, A.C.T. 2601, Australia
M. Persson
Affiliation:
Department of Theoretical Physics and Plasma Research Laboratory, Research School of Physical Sciences, The Australian National University, G.P.O. Box 4, Canberra, A.C.T. 2601, Australia
Get access Rights & Permissions [Opens in a new window]

Abstract

The effect of a sheared equilibrium mass flow on the resistive tearing mode is studied numerically by calculating Δ′. Both stabilizing and destabilizing effects are found, depending on the velocity and magnetic field profiles. Specifically, when q0 ≈ 1, the flow is strongly stabilizing for centrally peaked current profiles, whereas the flow has a strongly destabilizing effect for flatter current profiles. While the extreme effects are more pronounced for larger flows, a smaller flow may have more influence on marginal stability. The case where the flow speed becomes comparable to the Alfvén speed is also examined. It is found that this may lead to the equations being singular at points other than a rational surface, drastically changing the behaviour of the mode.

Type
Research Article
Information
Journal of Plasma Physics , Volume 45 , Issue 2 , April 1991 , pp. 267 - 283
Copyright
Copyright © Cambridge University Press 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bondeson, A. 1986 Nucl. Fusion, 26, 929.CrossRefGoogle Scholar
Bondeson, A. & Persson, M. 1986 Phys, Fluids, 29, 2997.CrossRefGoogle Scholar
Bondeson, A., Iacono, R. & Bhattacharjee, A. 1987 Phys. Fluids, 30, 2167.CrossRefGoogle Scholar
Chen, X. L. & Morrison, P. J. 1990 a Phys. Fluids, B 2, 495.CrossRefGoogle Scholar
Chen, X. L. & Morrison, P. J. 1990 b Phys. Fluids, B 2, 2575.CrossRefGoogle Scholar
Dobrott, D., Prager, S. C. & Taylor, J. B. 1977 Phys. Fluids, 20, 1850.CrossRefGoogle Scholar
Einaudi, G. & Rubini, G. 1986 Phys. Fluids, 26, 2563.CrossRefGoogle Scholar
Furth, H. P., Killeen, J. & Rosenbluth, M. N. 1963 Phys. Fluids, 6, 459.CrossRefGoogle Scholar
Furth, H. P., Rutherford, P. H. & Selberg, H. 1973 Phys. Fluids, 16, 1054.CrossRefGoogle Scholar
Hofmann, I. 1975 Plasma Phys. 17, 143.CrossRefGoogle Scholar
Paris, R. B. & Sy, W. N.-C. 1983 Phys. Fluids, 26, 2966.CrossRefGoogle Scholar
Persson, M. 1991 Nucl. Fusion 31, 382.CrossRefGoogle Scholar
Persson, M. & Bondeson, A. 1990 Phys. Fluids, B2, 2315.CrossRefGoogle Scholar
Strauss, H. R. 1976 Phys. Fluids, 19, 134.CrossRefGoogle Scholar