Community Research and Development Information Service - CORDIS

Abstract

Electron cyclotron current drive (ECCD) is an important prospective tool for tailoring the current profile in next-step devices. To fill the remaining gaps between ECCD theory and experiment, especially in the efficiency and localisation of current drive, a better understanding of the physics of Suprathermal electrons appears necessary. On TCV, the fast electron population is diagnosed by a multichordal, spectrometric hard X-ray camera and by a high field side ECE radiometer. The main modelling tool is the quasi-linear Fokker-Planck code CQL3D, which is equipped with a radial particle transport model. Systematic studies of fast electron dynamics have been performed in TCV with modulated or pulsed electron cyclotron power, followed by coherent averaging, in order to identify the roles of collisional relaxation and radial transport in the dynamics of the Suprathermal population. A consistent picture is emerging from experiment and modelling, pointing to the crucial role of the radial transport of Suprathermal electrons in the physics of ECCD.

A version of this report was published in http://icadc.cordis.lu/fep-cgi/srchidadb?ACTION=D&SESSION=&RCN=200315838&CALLER=PUBL_LIB ("Papers presented at the 19th IAEA Fusion Energy Conference").

Additional information

Authors: CODA S, Centre de Recherches en Physique des Plasmas, EURATOM/Confédération Suisse, École Ploytechnique Fédérale de Lausanne (CH);ALBERTI S, Centre de Recherches en Physique des Plasmas, EURATOM/Confédération Suisse, École Ploytechnique Fédérale de Lausanne (CH);BLANCHARD P, Centre de Recherches en Physique des Plasmas, EURATOM/Confédération Suisse, École Ploytechnique Fédérale de Lausanne (CH);GOODMAN T P, Centre de Recherches en Physique des Plasmas, EURATOM/Confédération Suisse, École Ploytechnique Fédérale de Lausanne (CH);HENDERSON M A, Centre de Recherches en Physique des Plasmas, EURATOM/Confédération Suisse, École Ploytechnique Fédérale de Lausanne (CH);NIKKOLA P, Centre de Recherches en Physique des Plasmas, EURATOM/Confédération Suisse, École Ploytechnique Fédérale de Lausanne (CH);SAUTER O, Centre de Recherches en Physique des Plasmas, EURATOM/Confédération Suisse, École Ploytechnique Fédérale de Lausanne (CH);PEYSSON Y, Département de Recherches sur la Fusion Contrôlée, Association EURATOM-CEA, CEA Cadarache, Saint Paul-lez-Durance (FR)
Bibliographic Reference: EPFL Internal report LRP 742/02, December 2002. 19pp.
Availability: Available free of charge from: École Polytechnique Fédérale de Lausanne (EPFL), Ecublens, CH-1015 Lausanne Fax +41-21-6934747
ISBN: ISSN: 0458-5895
Record Number: 200315919 / Last updated on: 2003-02-19
Category: PUBLICATION
Original language: en
Available languages: en