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Outline of a theory of lower-hybrid wave absorption

Published online by Cambridge University Press:  13 March 2009

E. Canobbio  and
R. Croci
E. Canobbio
Affiliation:
Commission of the European Communities, Brussels, Belgium
R. Croci
Affiliation:
Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-8046 Garching, Germany
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Extract

This paper outlines a theory of absorption of lower-hybrid (LH) waves in an electron plasma that is based on the nonlinear relation between grad │E3│2, where E3 is the electric field component parallel to the external homogeneous magnetic field, and the space dependent quasi-linear diffusion coefficient, and consequently between grad │E3│2 and the absorption. A local absorption induces an increase of the value of the gradient in the neighbouring region and thereby extends the absorption domain. In this way virtually total ‘single-path’ absorption of the injected LH power is obtained. The theory also allows an explanation of the density limit in current drive.

Type
Articles
Information
Journal of Plasma Physics , Volume 50 , Issue 2 , October 1993 , pp. 251 - 266
Copyright
Copyright © Cambridge University Press 1993

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References

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