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Driven, steady-state RFP computations

Published online by Cambridge University Press:  13 March 2009

J. P. Dahlburg ,
D. Montgomery ,
G. D. Doolen  and
L. Turner
J. P. Dahlburg
Affiliation:
Dartmouth College, Hanover, New Hampshire 03755, U.S.A.
D. Montgomery
Affiliation:
Dartmouth College, Hanover, New Hampshire 03755, U.S.A.
G. D. Doolen
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
L. Turner
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
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Abstract

A previously described pseudospectral three-dimensional MHD code is used to compute the dynamical behaviour of a channel of magnetofluid carrying an axial current and magnetic flux. This situation contains the essential MHD behaviour of the reversed-field-pinch (RFP). An externally imposed electric field is applied to an initially current-free magnetofluid, and drives currents that rise and eventually fluctuate about values corresponding to pinch ratios Θ ≈ 1·3, 2·2 and 4·5. A period of violent turbulence leads to an approximately force-free core, surrounded by an active MHD boundary layer that is not force-free. A steady state is reached that can apparently be sustained indefinitely (≥several hundred Alfvén transit times). The turbulence level and time variability in the steady state increase with increasing Θ. The average toroidal magnetic field at the wall reverses for the Θ ≈ 2·2 and 4·5 runs, but not for the Θ ≈ 1·3 one. Negative toroidal current filaments are observed. The Lundquist numbers are of the order of a few hundred.

Type
Research Article
Information
Journal of Plasma Physics , Volume 40 , Issue 1 , August 1988 , pp. 39 - 68
Copyright
Copyright © Cambridge University Press 1988

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References

REFERENCES

Aydemir, A. Y. & Barnes, D. C. 1984 Phys. Rev. Lett. 52, 930.CrossRefGoogle Scholar
Aydemir, A. Y., Barnes, D. C., Caramana, E. J., Mirin, A. A., Nebel, R. A., Schnack, D. D. & Sgro, A. G. 1985 Phys. Fluids, 28, 898.CrossRefGoogle Scholar
Bodin, H. A. B. & Newton, A. A. 1980 Nucl. Fusion, 20, 1255.CrossRefGoogle Scholar
Caramana, E. J. & Schnack, D. D. 1986 Phys. Fluids, 29, 3023.CrossRefGoogle Scholar
Dahlburg, J. P., Montgomery, D., Doolen, G. D. & Turner, L. 1986 Phys. Rev. Lett. 57, 428.CrossRefGoogle Scholar
Dahlburg, J. P., Montgomery, D., Doolen, G. D. & Turner, L. 1987 J. Plasma Phys. 37, 299, and references therein.CrossRefGoogle Scholar
Gimblett, C. G., Hall, P. J., Taylor, J. B. & Turner, M. F. 1987 Phys. Fluids, 30, 3186.CrossRefGoogle Scholar
Hinze, J. O. 1975 Turbulence. McGraw-Hill.Google Scholar
Riyopoulos, A., Bondeson, A. & Montgomery, D. 1982 Phys. Fluids, 25, 107.CrossRefGoogle Scholar
Rusbridge, M. G. 1969 a Plasma Phys. 11, 35.CrossRefGoogle Scholar
Rusbridge, M. G. 1969 b Plasma Phys. 11, 73.CrossRefGoogle Scholar
Rusbridge, M. G. 1977 Plasma Phys. 19, 499.CrossRefGoogle Scholar
Rusbridge, M. G. 1980 a Plasma Phys. 22, 331.CrossRefGoogle Scholar
Rusbridge, M. G. 1980 b Proceedings of Reversed Field Pinch Theory Workshop (ed. Lewis, H. R.). Los Alamos National Laboratory, Report No. LA-8944-C.Google Scholar
Sarff, J. S., Sprott, J. C. & Turner, L. 1987 Phys. Fluids, 30, 2155.CrossRefGoogle Scholar
Schnack, D. D., Barnes, D. C., Mikic, Z., Harned, D. S., Caramana, E. J. & Nebel, R. A. 1986 Comp. Phys. Commun. 43, 17.CrossRefGoogle Scholar
Tamano, T., Bard, W. D., Chu, C., Kondoh, Y., LaHaye, R. J., Lee, P. S., Saito, M. T., Schaffer, M. J. & Taylor, P. L. 1987 General Atomic Preprint GA-A18821.Google Scholar
Taylor, J. B. 1974 a Phys. Rev. Lett. 33, 1139.CrossRefGoogle Scholar
Taylor, J. B. 1974 b Proceedings of the 5th International Conference on Plasma Physics and Controlled Fusion, Tokyo, vol. 1, p. 161. IAEA.Google Scholar
Taylor, J. B. 1976 Pulsed High-Beta Plasmas (ed. Evans, D. E.), pp. 59–67. Pergamon.CrossRefGoogle Scholar
Taylor, J. B. 1986 Rev. Mod. Phys. 58, 741.CrossRefGoogle Scholar
Turner, L. & Christiansen, J. P. 1981 Phys. Fluids, 24, 893.CrossRefGoogle Scholar