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Measurements of the oscillating fields and the time-averaged forces in rotating magnetic field current drive

Published online by Cambridge University Press:  13 March 2009

G. A. Collins ,
G. Durance  and
J. Tendys
G. A. Collins
Affiliation:
Australian Nuclear Science and Technology Organisation, Lucas Heights Research Laboratories, Private Mail Bag 1, Menai NSW 2234, Australia
G. Durance
Affiliation:
Australian Nuclear Science and Technology Organisation, Lucas Heights Research Laboratories, Private Mail Bag 1, Menai NSW 2234, Australia
J. Tendys
Affiliation:
Australian Nuclear Science and Technology Organisation, Lucas Heights Research Laboratories, Private Mail Bag 1, Menai NSW 2234, Australia
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Abstract

Measurement of the RF (radio-frequency) magnetic field about the equatorial plane of the rotamak has enabled the distribution of the oscillating currents to be derived. The time-averaged forces, produced by the interaction of these currents with the oscillating field, have been estimated. In the standard field-reversed configuration there is a radial force, which helps to confine the plasma pressure, and a toroidal force, which drives the equilibrium current. In compact tokamak configurations there is an additional poloidal force, which produces a diamagnetic current. As the toroidal field increases, penetration of the RF fields improves owing to the excitation of a whistler wave mode. The connection between the rotating magnetic field technique and fast wave current drive is explained.

Type
Research Article
Information
Journal of Plasma Physics , Volume 40 , Issue 1 , August 1988 , pp. 127 - 142
Copyright
Copyright © Cambridge University Press 1988

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