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Abstract

Moderately peaked electron density profiles are observed in virtually all plasma conditions in TCV. The existence of an anomalous pinch is unambiguously demonstrated by the observation of peaked density profiles in stationary, fully relaxed, fully current driven ECCD discharges with V(loop)=0. The behaviour of the density profiles from a database of 300 Ohmic L and H-mode, as well as ECH and ECCD discharges, is compared to predictions of models based on the Ware pinch, the curvature pinch and anomalous Thermodiffusion. Best overall agreement throughout the database is obtained with models combining an anomalous pinch mechanism, such as the curvature pinch, with the Ware pinch.

Additional information

Authors: ZABOLOTSKY A, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH);WEISEN H, Centre de Recherches en Physique des Plasmas, Association EURATOM-Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne (CH)
Bibliographic Reference: An article due to be published in Plasma Physics and Controlled Fusion, and in EPFL internal report 760/03
Availability: Available free of charge from: École Polytechnique Fédérale de Lausanne (EPFL), Ecublens, CH-1015 Lausanne Fax +41-21-6934747
Record Number: 200316328 / Last updated on: 2003-05-30
Category: PUBLICATION
Original language: en
Available languages: en