Journal Article

PreJuSER-9562

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Geometry and performance of the solid tungsten divertor row in JET

Rapp, J. ; Pintsuk, G. ; Mertens, P.FZJ* ; Altmann, H. ; Lomas, P. J. ; Riccardo, V.

2010
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.fusengdes.2009.08.009

Abstract: 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.

Keyword(s): J ; JET (auto) ; Plasma-facing components (auto) ; Divertor tiles (auto) ; Tile shadowing (auto)

Note: This work, supported by the European Communities under the contract of Association between EURATOM/FOM, was carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

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Contributing Institute(s):

1. Plasmaphysik (IEF-4)
2. Plasmaphysik (IEK-4)

Research Program(s):

1. Fusion (P13)

Appears in the scientific report 2010

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