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Abstract

Electron transport in tokamaks has 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/LTe 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/LTe. This is confirmed by modulation experiments using electron cyclotron heating. Simulations with empirical and physics-based transport models confirm this assumption.

Paper given at 28th EPS Conference on Controlled Fusion and Plasma, held at Funchal, Madeira (PT) from 18 to 22 June 2001.

Additional information

Authors: RYTER F, Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching (DE);SUTTROP W, Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching (DE);TARDINI G, Max-Planck-Institut für Plasmaphysik, EURATOM Association, Garching (DE);ANGIONI C, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique de Lausanne, Association EURATOM-Confédération Suisse, Lausanne (CH);BUERSKENS M, OM Institut voor Plasmafysica `Rijnhuizen', Associate Euratom-FOM, Nieuwegein (NE);HOGEWEIJ G M D, OM Institut voor Plasmafysica `Rijnhuizen', Associate Euratom-FOM, Nieuwegein (NE);CIRANT S, Istituto di Fisica del Plasma, Associazione EURATOM-ENEA-CNR, Milano (IT);JACCHIA A, Istituto di Fisica del Plasma, Associazione EURATOM-ENEA-CNR, Milano (IT);MANTICA P, Istituto di Fisica del Plasma, Associazione EURATOM-ENEA-CNR, Milano (IT);HOANG G T, Département de Recherches sur la Fusion Contrôlée, Association Euratom - CEA, CEA Cadarache, St Paul lez Durance (FR);IMBEAUX F, Département de Recherches sur la Fusion Contrôlée, Association Euratom - CEA, CEA Cadarache, St Paul lez Durance (FR)
Bibliographic Reference: An article published in: Plasma Physics and Controlled Fusion, 43 (December 2001) 323-338
Record Number: 200214712 / Last updated on: 2002-05-16
Category: PUBLICATION
Original language: en
Available languages: en