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P: Plasmaphysik

P 12: Plasma Wall Interaction, Diagnostic and Low Temperature Discharges (Poster Session)

P 12.9: Poster

Friday, April 6, 2001, 12:30–15:00, AT2

Tomographic reconstruction of impurity radiation in the JET MkIIGB Divertor — •A. Huber¹, P. Coad², D. Coster³, C. Ingesson⁴, G.F. Matthews², Ph. Mertens¹, V. Philipps¹, A. Pospieszczyk¹, B. Schweer¹, G. Sergienko⁵, and M. Stamp² — ¹Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, EURATOM Association, Trilateral Euregio Cluster, D-52425 Jülich, Germany — ²JET Joint Undertaking, Abingdon, Oxfordshire, OX14 3EA — ³Max-Planck-Institut für Plasmaphysik, Garching — ⁴FOM-Instituut voor Plasmafysica, Nieuwegein, The Netherlands — ⁵Institute of High Temperatures, Russian Academy of Sciences, Moscow, Russian Federation

At the JET tokamak, the spatial distribution of impurity radiation in the divertor has been analysed using three CCD cameras coupled to interference filters measuring deuterium (D_α, D_γ) and carbon (CII, CIII) lines. These measurements are of fundamental importance for power exhaust from the divertor via impurity radiation which has to reduce the peak power loads and for the analysis of erosion and deposition processes. The 2D emission profiles, obtained under a given viewing angle, have been reconstructed by the Singular Value Decomposition method to transform the emission pattern into a poloidal plane. This method and some results will be presented and discussed.