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Abstract

A ôstandardö, single null lower diverted discharge has been developed to enable continuous monitoring of the first wall conditions and to characterise the effectiveness and influence of wall conditioning in the TCV tokamak. Measurements over a period encompassing nearly 2000 ohmic discharges of varying configuration and input power show the global confinement time and main plasma impurity concentrations to be good general indicators of the first wall condition, whilst divertor target profiles demonstrate strikingly the short term beneficial effects of He glow. Good agreement, consistent with a reduction in recycling at the plates is found between the predictions of the fluid code UEDGE and the observed outer divertor profiles of T(e) and n(e) before and after He glow.

Additional information

Authors: PITTS ET AL, Centre de Recherches en Physique des Plasmas, EURATOM Association-Confederation Suisse, Ecole Polytechnique Federale de Lausanne (CH);PETRZILKA J, Institute of Plasma Physics, Czech Academy of Sceinces, (CZ);PIFFL V, Institute of Plasma Physics, Czech Academy of Sceinces, (CZ);REINKE P, Universitat Basel, Institut fur Physik (CH);RENSINK M.E, Lawrence Livermore National Laboratory, University of California, Berkeley (US);SMITH G.R, Lawrence Livermore National Laboratory, University of California, Berkeley (US)
Bibliographic Reference: An article published in: Journal of Nuclear Materials, 241-243 (1997), pp.867-872
Record Number: 200013663 / Last updated on: 2001-09-18
Category: PUBLICATION
Original language: en
Available languages: en