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Abstract

Electron transport in tokamaks have many different features, which are briefly reviewed. The paper is focused on electron heat transport in conventional tokamak plasmas. An inter-machine comparison indicates that the non-dimensional gradient length of the electron temperature profiles R/L(Te) is almost independent of the devices and varies little with plasma parameters. This strongly suggests that electron heat transport is governed by turbulence with a threshold in R/L(Te). This is confirmed by modulation experiments using electron cyclotron heating. Simulations with empirical and physics-based transport models confirm this assumption.

Additional information

Authors: RYTER F, Max-Planck-Institut fur Plasmaphysik, Garching (DE);SUTTROP W, Max-Planck-Institut fur Plasmaphysik, Garching (DE);TARDINI G, Max-Planck-Institut fur Plasmaphysik, Garching (DE);ANGIONI C, Ecole Polytechnique des Lausanne, Centre de Recherches en Physique des Plasmas, Lausanne (CH);BEURSKENS M, FOM Instituut voor Plasmafysica, Nieuwegein (NL);HOGEWEIJ G M D, FOM Instituut voor Plasmafysica, Nieuwegein (NL);CIRANT S, Instituto di Fisica del Plasma, Milano (IT);JACCHIA A, Instituto di Fisica del Plasma, Milano (IT);MANTICA P, Instituto di Fisica del Plasma, Milano (IT);HOANG G T, CEA Cadarache, Departement de Recherches sur la Fusion Controlee, St Paul lez Durance (FR);IMBEAUX F, CEA Cadarache, Departement de Recherches sur la Fusion Controlee, St Paul lez Durance (FR)
Bibliographic Reference: An article published in: Plasma Physics and Controlled Fusion, Vol.43 (2001), pp.A323-A338
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