%0 Journal Article
%A Terra, Alexis
%A Sergienko, Gennady
%A Gago, Mauricio
%A Kreter, Arkadi
%A Martynova, Y.
%A Rasinski, Marcin
%A Wirtz, Marius
%A Loewenhoff, Thorsten
%A Mao, Yiran
%A Schwalenberg, Daniel
%A Raumann, Leonard
%A Coenen, Jan Willem
%A Möller, Sören
%A Koppitz, Thomas
%A Dorow-Gerspach, Daniel
%A Brezinsek, Sebastijan
%A Unterberg, Bernhard
%A Linsmeier, Christian
%T Micro-structuring of tungsten for mitigation of ELM-like fatigue
%J Physica scripta
%V T171
%@ 1402-4896
%C Stockholm
%I The Royal Swedish Academy of Sciences
%M FZJ-2020-01942
%P 014045
%D 2020
%X Fusions reactors have to handle numerous specifications before being able to show viable commercial operation, one of which is to find a proper Plasma Facing Material (PFM) which can withstand the high heat loads of several tens of megawatts per square meters combined with the pulse operation of a tokamak and many other problematics (Brezinsek et al 2017 Nucl. Fusion 57 116041). Nowadays, only tungsten is considered as a PFM for high heat flux areas of a tokamak divertor. Tungsten has been selected due to its favorable physical properties, but tungsten has a major drawback: it is brittle under temperatures typically used for water-cooled plasma-facing components (PFC). Under these temperatures the damage threshold due to thermal fatigue induced by ELM is very low, which will dramatically reduce the life-time of the tungsten PFC. The ANSYS simulations and experiments with a millisecond pulsed laser demonstrate a strongly improved ability to withstand thermal fatigue by micro-structuring of the tungsten surface with the help of 150–240 μm diameter tungsten fibres
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000520000600045
%R 10.1088/1402-4896/ab4e33
%U https://juser.fz-juelich.de/record/875311