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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[E(3)]2, where E(3) is the electric field component parallel to the external homogeneous magnetic field, and the space dependent quasi-linear diffusion coefficient, and consequently between grad[E(3)]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.

Additional information

Authors: CANOBBIO E, European Commission, Bruxelles (BE);CROCI R, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Article: Journal of Plasma Physics, Vol. 50 (1993) part 2, pp. 251-266
Record Number: 199410306 / Last updated on: 1994-11-28
Original language: en
Available languages: en
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