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Abstract

The possibility of a non-inductive method to generate the entire plasma current in a tokamak represents a decisive step towards stationary discharges. The next generation of tokamaks will provide solutions directly applicable to the fusion reactor, and open up the possibility of direct coupling of the fast magnetosonic wave to the plasma electrons to sustain part of the current. The study of this interaction in a tokamak plasma consists of modelling the propagation and absorption of the fast wave, estimating possible decorrelation of the resonating interaction, and kinetically calculating the current generated and the efficiency of current generation. This efficiency is not high enough to enable total plasma current to be sustained by this method. A concept combining the fast wave for the core plasma and the low hybrid wave for the edge seems more appropriate. Preliminary experiments with direct coupling of the fast wave to the electrons of a tokamak plasma are reproduced satisfactorily by modelling, even though the domains of the parameters investigated do not yet permit a clear demonstration of current generation.

Additional information

Authors: BÉCOULET A, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);GIRUZZI G, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);MOREAU D, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);SAOUTIC B, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);BECOULET A, CEA, Departement de Recherches sur la Fusion Controlee, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Paper presented: Troisième Congrès de la Société Française de Physique - Plasma, Nancy (FR), September 16-18, 1992
Availability: Available from (1) as Paper FR 37076 ORA
Record Number: 199211489 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: fr
Available languages: fr