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A spectroscopic study of VUV emission from injected and intrinsic low-Z impurities has been carried out for Tore Supra ergodic divertor (ED) plasmas. Analysis of plasmas in which a nearby limiter effectively provides a spatially localised source of recycled impurities provides information illuminating the dynamical processes of impurity penetration in ED plasmas. The profile evolution behaviour is found to be consistent with an interpretation, which identifies both ED-influenced edge confinement and scrape-off layer and edge phenomena provided by the localized source. Preferentially increased edge impurity transport is a beneficial aspect of the ED.

Additional information

Authors: DE MICHELIS C ET AL, Association Euratom-CEA Cadarache, St Paul-lez-Durance (FR);HOGAN J, Oak Ridge National Laboratory, Oak Ridge (US)
Bibliographic Reference: An article published in: Plasma Physics and Controlled Fusion, 44 (June 2002), pp. 701-715
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