TY  - JOUR
AU  - Terra, Alexis
AU  - Sergienko, Gennady
AU  - Gago, Mauricio
AU  - Kreter, Arkadi
AU  - Martynova, Y.
AU  - Rasinski, Marcin
AU  - Wirtz, Marius
AU  - Loewenhoff, Thorsten
AU  - Mao, Yiran
AU  - Schwalenberg, Daniel
AU  - Raumann, Leonard
AU  - Coenen, Jan Willem
AU  - Möller, Sören
AU  - Koppitz, Thomas
AU  - Dorow-Gerspach, Daniel
AU  - Brezinsek, Sebastijan
AU  - Unterberg, Bernhard
AU  - Linsmeier, Christian
TI  - Micro-structuring of tungsten for mitigation of ELM-like fatigue
JO  - Physica scripta
VL  - T171
SN  - 1402-4896
CY  - Stockholm
PB  - The Royal Swedish Academy of Sciences
M1  - FZJ-2020-01942
SP  - 014045
PY  - 2020
AB  - 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
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000520000600045
DO  - DOI:10.1088/1402-4896/ab4e33
UR  - https://juser.fz-juelich.de/record/875311
ER  -