%0 Journal Article
%A Lemahieu, N.
%A Greuner, H.
%A Linke, Jochen
%A Maier, H.
%A Pintsuk, Gerald
%A Wirtz, Marius
%A Van Oost, Guido
%A Noterdaeme, J.-M.
%T Thermal Shock Behaviour of H and H/He-Exposed Tungsten at High Temperature
%J Physica scripta
%V T167
%@ 0031-8949
%C Bristol
%I IoP Publ.
%M FZJ-2016-02295
%P 014008
%D 2016
%X Polycrystalline tungsten samples were characterized and exposed to a pure H beam or mixed H/He beam containing 6% He in GLADIS at a surface temperature of 600 °C, 1000 °C, or 1500 °C. After 5400 s of exposure time with a heat flux of 10.5 MW m−2, the total accumulated fluence of 2 × 1025 m−2 was reached. Thereafter, edge localized mode (ELM)-like thermal shocks with a duration of 1 ms and an absorbed power density of 190 MW m−2 and 380 MW m−2 were applied on the samples in JUDITH 1. During the thermal shocks, the base temperature was kept at 1000 °C. The ELM-experiments with the lowest transient power density did not result in any detected damage. The other tests showed the beginning of crack formation for every sample, except the sample pre-exposed with the pure H-beam at 1500 °C in GLADIS. This sample was roughened, but did not show any crack initiation. With exception to the roughened sample, the category of ELM-induced damage for the pre-exposed samples is identical to the reference tests without pre-exposure to a particle flux.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000383504700009
%R 10.1088/0031-8949/T167/1/014008
%U https://juser.fz-juelich.de/record/808662