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Unlike the energy confinement time, the particle confinement time in tokamak discharges is not directly measurable. Actually, the particle flux coming out of the plasma is counterbalanced by the recycling flux in the region of direct plasma-wall interaction. This recycling flux is difficult to measure. Consequently, assumptions and modelling are required to sort out the confinement time. In this paper, three set of limiter discharges -without external fuelling at different plasma currents, with calibrated gas puffing under different wall conditions, and with LHCD over long duration -are analysed. From particle balance equation, particle exhaust and Ha measurements some insight is provided on particle confinement in Tore Supra discharges.

Additional information

Authors: BUCALOSSI J ET AL, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: 30th EPS Conference on Controlled Fusion and Plasma Physics Organised by: European Physical Society Held at: St. Petersburg, Russia, 7-11 July 2003 Paper No. P-1.141 Proceedings available online at: http://eps200
Availability: Available from Association EURATOM-CEA, Département de Recherches sur la Fusion Contrôlée, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel:+33-4-42257001; Fax:+33-4-42256421 E-mail:
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