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Abstract

Long pulse operation, and the related issues such as non inductive current drive, particle control and power exhaust, is a crucial point to investigate for next step machines. On the tokamak Tore Supra, equipped with superconducting magnets and actively cooled plasma facing components, 6 minutes discharges, coupling 1 GJ of energy to the plasma, have been obtained. In these discharges the plasma current is driven by LH wave power while the loop voltage is maintained constant zero (bootstrap fraction ~10%). Typical characteristics are B(T)=3.4T, I(p)=0.5MA, LHCD-3MW, and line integrated density nl=2.60x10{19}m{-2}. The plasma density and impurity level (Z(eff)~2) are perfectly controlled all along the discharge, the main limitation coming from the LH power source. Particle studies have been carried out taking benefit from the long duration of the pulse, current breakdown, ramp-up and ramp-down phases playing a negligible role in the balance.

Additional information

Authors: BUCALOSSI J et al, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: 32nd EPS Conference on Controlled Fusion and Plasma Physics Organised by: Asociación EURATOM-CIEMAT para Fusión Held at: Congress Palace of Tarragona, Tarragona (ES)
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, FranceL%Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: dirdrfc@drfc.cad.cea.fr
Record Number: 200518274 / Last updated on: 2005-07-26
Category: PUBLICATION
Original language: en
Available languages: en