Erlangen 2018 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 23: Plasma Wall Interaction II

P 23.1: Hauptvortrag

Donnerstag, 8. März 2018, 10:30–11:00, A 0.112

Advanced Materials for a Damage Resilient Divertor for DEMO — •Jan Willem Coenen¹, Johann Riesch², Hanns Gietl^2,3, Yiran Mao¹, Leonard Raumann¹, Rudolf Neu^2,3, and Christian Linsmeier¹ — ¹Forschungszentrum Jülich GmbH, Institut fuer Energie und Klimaforschung, 52425 Juelich — ²Max-Planck-Institut für Plasmaphysik, 85748 Garching — ³Technische Universität München, Boltzmannstrasse 15, 85748 Garching

Material issues pose a significant challenge for future fusion reactors like DEMO and highly integrated approach is required. Cracking, oxidation as well as fuel management are driving issues when deciding for new materials. Neutron induced effects e.g. transmutation adding to embrittlement are crucial to material performance. Here advanced materials e.g. Wf/W composites allow the step towards a fusion reactor. Recent developments in the area of Wf/W will be presented showing a possible path towards a component based on standard tungsten production technologies. Damage resilient materials, with an increased operational temperature range facilitate component design with higher exhaust capabilities. The maximization of operational performance can only be achieved, if improvements of material properties, mechanical and thermal, are well balanced Wf/W contributes here to advanced material strength and crack resilience even after embrittlement. Rigorous testing with respect to plasma-wall-interaction and high heat-flux performance are ongoing. Prototype components are envisioned in the ner future.