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Toroidal transport due to the anomalous slowing down of low-parallel-velocity electrons (with gyroradius less than the Debye length) by enhanced electron-ion collision is investigated. Expressions for the particle, energy and canonical angular momentum diffusivities are obtained. Large diffusivities are found to occur at the cold, low-density edge and may be eliminated by a nominal increase of ion temperature at this edge, resembling the L-H mode transition in tokamak plasmas.

Additional information

Authors: PURI S, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPP 4/244 EN (1990) 12 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
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