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Abstract

The assembly of the highly-loaded target plates of the WENDELSTEIN 7-X (W7-X) divertor requires the fabrication of 890 target elements (TEs). The plasma facing material is made of CFC NB31 flat tiles bonded to a CuCrZr copper alloy water-cooled heat sink. The elements are designed to remove a stationary heat flux and power up to 10 MW m{-2} and 100 kW, respectively. Before launching the serial fabrication, pre-series activities aimed at qualifying the design, the manufacturing route and the non-destructive examinations (NDEs). High heat flux (HHF) tests performed on full-scale pre-series TEs resulted in an improvement of the design of the bond between tiles and heat sink to reduce the stresses during operation. The consequence is the fabrication of additional pre-series TEs to be tested in the HHF facility GLADIS. NDEs of this bond based on thermography methods are developed to define the acceptance criteria suitable for serial fabrication.

Additional information

Authors: BOSCARY J, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);BÖSWIRTH B, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);GREUNER H, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);STREIBL B, Max-Planck-Institut für Plasmaphysik, IPP-EURATOM Association, Garching (DE);GRIGULL P, Max-Planck-Institut für Plasmaphysik, EURATOM Association, Teilinstitut Greifswald, Greifswald (DE);MISSIRLIAN M, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SCHLOSSER J, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);PLANKENSTEINER A, Plansee SE, Technology Center, Reutte (AT);SCHEDLER B, Plansee SE, Technology Center, Reutte (AT);FRIEDRICH T, Plansee SE, Technology Center, Reutte (AT);TRAXLER H, Plansee SE, Technology Center, Reutte (AT)
Bibliographic Reference: An article published in: Physica Scripta T128 (2007), pp. 195-199
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1088/0031-8949/2007/T128/037
Record Number: 200719140 / Last updated on: 2007-04-11
Category: PUBLICATION
Original language: en
Available languages: en