Geometry and expected performance of the solid tungsten outer divertor row in JET

TitleGeometry and expected performance of the solid tungsten outer divertor row in JET
Publication TypeJournal Article
Year of Publication2010
AuthorsJ. Rapp, G. Pintsuk, P. Mertens, H. Altmann, P.J Lomas, V. Riccardo
JournalFusion Engineering and Design
Date PublishedApr
Type of ArticleArticle
ISBN Number0920-3796
Accession NumberISI:000277644100001
KeywordsDESIGN, Divertor tiles, JET, Plasma-facing components, Tile shadowing

At JET new plasma-facing components for the main chamber wall and the divertor are being designed and built to mimic the expected ITER plasma wall conditions in the deuterium-tritium operation phase. The main wall elements at JET will be made of beryllium and the divertor plasma-facing surface will be made of tungsten. Most of the divertor tiles will consist of tungsten-coated Carbon Fibre Composite (CFC) material. However one toroidal row in the outer divertor will be made of solid, inertially cooled tungsten. The geometry of these solid tungsten divertor components is optimized within the boundary conditions of the interfaces and the constraints given by the electrodynamical forces. Shadowing calculations as well as rough field line penetration analysis is used to define the geometry of the tungsten lamella stacks. These calculations are based on a set of magnetic equilibria reflecting the operation domain of current JET plasma scenarios. All edges in poloidal and toroidal direction are shadowed to exclude near perpendicular field line impact. In addition, the geometry of the divertor structure is being optimized so that the fraction of the plasma wetted surface is maximised. On the basis of the optimized divertor geometry, performance calculations are done with the help of ANSYS to assess the maximum power exhaust possible with this inertially cooled divertor row. (C) 2009 ETDA-Jet. Published by Elsevier B.V. All rights reserved.

URL<Go to ISI>://000277644100001

Fusion Physics



Alternate TitleFusion Eng. Des.

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