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A confinement model is proposed in terms of two heat equations. The heat conduction model is based on the non-linear theory of the trapped electron mode, but yields a linear neo-Alcator law. An expression is given for the auxiliary power deposition profile if this is not taken to be constant. Numerical results for the modulation of turbulence level in TEXTOR obtained from the model yield simultaneous agreement between the theoretical and experimental values of the base turbulence level and of its modulation, as well as a reasonable value of the energy confinement time. An ohmic density scan gives T(e) profiles which are constant for different densities in the "confining zone". Calculations for an RF power scan reproduce the observed degradation of confinement quantitatively. The numerical and experimental temperature profiles for an ohmic shot from JET are compared.

Additional information

Authors: ROGISTER A, Institut fur Plasmaphysik Kernforschungsanlage Julich GmbH (DE)
Bibliographic Reference: Paper presented: ITER Working Week, Garching (DE), May 24-27, 1988
Availability: Available from (1) as Paper EN 34526 ORA
Record Number: 198910314 / Last updated on: 1994-12-01
Original language: en
Available languages: en