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Abstract

Operation of Tore Supra has resumed after a major upgrade of internal components in order to increase the heat extraction capability to 25MW for 1000 s and address long-pulse research at the level of power density flowing through the last closed flux surface relevant for the next step. This overview highlights first the related technology developments: industrial realization and tests with plasma of about 600 limiter components made of some 12 000 actively cooled CFC tiles. World record breaking discharges with a coupled (and extracted) energy of 0.74 GJ have been obtained, with durations exceeding 4 min, limited only by the long-pulse capability of the heating and current drive systems. Particle balance analysis shows that the in-vessel deuterium inventory never reached saturation.
For the same plasma parameters, the in-vessel inventory is reduced by a factor of ¡Ö2 when efficient supersonic gas injection is used. New physics is observed when the loop voltage vanishes for long times: the density remains peaked in spite of the absence of the Ware pinch effect, and, independently, the response to additional heating becomes dominated by a complex interplay between transport and current drive. The contributions of the EURATOM-CEA Association to fusion energy research also include new developments in the field of plasma-facing components, negative ion beam injection (1000 s H- source and SINGAP acceleration to 1 MeV) and superconductors (cable in conduit concept, connections, testing). Finally, European studies for Cadarache as a site for ITER conclude that all ITER technical requirements are met.

Additional information

Authors: JACQUINOT J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Article published in: Nuclear Fusion 43 (2003), pp. 1583�1599
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://pub.iaea.org/MTCD/NF/NFusion.asp
Record Number: 200417373 / Last updated on: 2004-02-02
Category: PUBLICATION
Original language: en
Available languages: en