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Thermo-mechanical analysis of the Wendelstein 7-X divertor
Authors:MY Ye  V Bykov  A Peacock  F Schauer
Affiliation:1. Max-Planck-Institut Für Plasmaphysik Teilinstitut Greifswald, Wendelsteinstraße 1, D-17491 Greifswald, Germany;2. Max-Planck-Institut Für Plasmaphysik, Boltzmannstraße 2, D-85748, Garching bei München, Germany;3. Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, PR China
Abstract:The stellarator Wendelstein 7-X (W7-X) has a divertor consisting of 10 units installed inside the plasma vessel (PV). It was decided not to install the long pulse high-heat flux (HHF) divertor targets at the first two years stage of W7-X operation and to start with an adiabatically cooled test divertor unit (TDU) and shorter plasma pulses operation. This allows to accumulate operation experience with much simpler components, and as a result to adjust accurately the actively cooled HHF divertor which replaces the TDU for the stationary operation. Finite element (FE) analyses have been performed for better understanding of thermo-mechanical problems of divertor targets, and to guide the design of the TDU and HHF divertors. This paper presents the detailed results of the temperature response, the deformation and thermal stress of the divertor components.
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