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Dynamic feedback for multi-mode plasma instabilities

Published online by Cambridge University Press:  13 March 2009

Amiya K. Sen
Amiya K. Sen
Affiliation:
Department of Electrical Engineering and Computer Science and Plasma Research Laboratory, Columbia University, New York, N.Y.
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Abstract

Constant feedback, which has been used exclusively, fails to stabilize more than one mode of a plasma instabiliity. It is shown that a suitable dynamic or frequency-dependent feedback can stabilize all modes. Methods are developed in which such a feedback strucutre can be chosen in terms of its poles and zeros in relation to those of the plasma transfer function in the complex frequency plane. The synthesis procedure for such a feedback sturcure, in the form of an integrated electronic circuit is also discussed. As an example, a dynamic feedback for multi-mode stabilization of a collisional drift wave instability is developed in detail.

Type
Research Article
Information
Journal of Plasma Physics , Volume 20 , Issue 1 , August 1978 , pp. 1 - 16
Copyright
Copyright © Cambridge University Press 1978

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