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FP7

Determination of a thermal property of carbon layers from IR measurements in JET NBI test bed using optimisation methods

Funded under: FP7-EURATOM

Abstract

An optimisation algorithm is used to realize an automated determination of a carbon layer thermal property from IR temperature measurements. This algorithm is based on a 1D linear thermal model of the plasma facing component. It is tested on measurements from two MkIIa JET divertor tiles placed in the NBI JET test bed. Heat fluxes of 5-100 MW/ m{2} were applied on those tiles. The resulting surface distribution of the carbon layer is discussed, including its evolution through the experiment, and its influence on the computed surface heat loads. Heat fluxes computed from IR and thermocouple temperature measurements are compared to the previous results. First computation of heat loads during short high flux NBI pulses simulating ELMs using previously determined carbon layer properties are also presented.

Additional information

Authors: DAVIOT Ra, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GAUTHIER E, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);CARPENTIER S, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);CORRE Y, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GARDAREIN J L, 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: 18th International Conference on Plasma-Surface Interactions in Controlled Fusion Device Organised by: Laboratorio Nacional de Fusión Held in: Toledo (ES)
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1016/j.jnucmat.2009.01.258
Record Number: 200910315 / Last updated on: 2009-09-22
Category: PUBLICATION
Original language: en
Available languages: en