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This paper offers a resolution of the lower hybrid current drive spectral gap problem via modifications in the Landau damping spectrum for the high phase velocity waves in the toroidal geometry. The emergence of parametric resonances produced by the beating of the particles' periodicity with the wave periodicity spreads out Landau damping in velocity space, enhances the net energy absorption, and could lead to the generation of superthermal tails. The existence of the lower hybrid density limit and alpha particle heating are explained within the context of linear theory.

Additional information

Authors: PURI S, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);WILHELM R, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPP 4/254 EN (1992) 14 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 199211261 / Last updated on: 1994-11-29
Original language: en
Available languages: en