GENERATION OF HOT CLOSED HELICAL BANDS BY ELECTRON CYCLOTRON RESONANCE HEATING OF RATIONAL Q TOKAMAK FLUX SURFACES
The author discussed RF heating of three classes of Tokamak flux surface which intersect the electron cyclotron resonance heating region: rational-q, near rational-q, and irrational-q. On irrational-q surfaces, the degree of heating is the same for all electrons. On and near rational-q surfaces, heating is localized to closed helical bands of electrons. These hot bands support local enhancements of current density, and act as current carrying filaments within the plasma. The poloidal magnetic field associated with these currents has X-points. The use of ECRH as a current drive mechanism will enhance these effects, as will an increase in the size of Tokamak major radius.
Bibliographic Reference: WRITE TO THE LIBRARIAN, UKAEA, CULHAM LABORATORY, ABINGDON, OXON OX14 3DB (UK), MENTIONING REPORT CLM-P747, 1985
Record Number: 1989124042100 / Last updated on: 1987-01-01
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