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A new model for the electron temperature profile resilience in the outer half of tokamak plasmas is proposed and investigated. It is shown that introducing a negative feedback term into the scaling of the electron heat diffusivity results in the observed T(e) profile stiffness against variations of the density and heating profiles. In addition, the feedback yields the measured approximately linear T(e)(r) shape for r/a of the order of 0.5, in contrast to previous profile constraining models.

Additional information

Authors: BECKER G, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPP 5/51 EN (1993) 11 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
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