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RF current drive with magnetic helicity injection

Published online by Cambridge University Press:  13 March 2009

D. K. Bhadra  and
C. Chu
D. K. Bhadra
Affiliation:
GA Technologies Inc., San Diego, California 92138, U.S.A.
C. Chu
Affiliation:
GA Technologies Inc., San Diego, California 92138, U.S.A.
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Abstract

External injection of magnetic helicity into a plasma may be possible through the introduction of appropriately polarized electromagnetic waves. A concept of steady-state current-drive is presented, based on the validity of conservation of helicity (appropriately defined for finite frequency processes). It is shown that such external injection of helicity can maintain a steady-state current by compensating the volt-seconds consumed through plasma resistivity. Such a mechanism, if experimentally successful, is particularly interesting at high densities because the efficiency of the process does not depend on plasma density, as opposed to other radio-frequency current-drive techniques.

Type
Research Article
Information
Journal of Plasma Physics , Volume 33 , Issue 2 , April 1985 , pp. 257 - 264
Copyright
Copyright © Cambridge University Press 1985

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References

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