%0 Journal Article
%A Lemahieu, Nathan
%A Balden, Martin
%A Elgeti, Stefan
%A Greuner, Henri
%A Linke, Jochen
%A Maier, Hans
%A Pintsuk, Gerald
%A Wirtz, Marius
%A Van Oost, Guido
%A Noterdaeme, Jean-Marie
%T H/He irradiation on tungsten exposed to ELM-like thermal shocks
%J Fusion engineering and design
%V 109-111
%@ 0920-3796
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2016-05453
%P 169 - 174
%D 2016
%X ELM-like thermal shocks and H/He particle exposure were subsequently applied on tungsten samples. Polished test specimens underwent in the JUDITH 1 electron beam facility 100 transient thermal events with a duration of 1 ms. The absorbed heat flux was 0.4 GW m−2 and 1.5 GW m−2, which is above the material's damage threshold. These experiments were done at room temperature and with the samples heated to 400 °C base temperature. Depending on the loading conditions the test specimens have either a crack network or showed surface roughening. The samples were then loaded in the GLADIS facility at different surface temperatures with a mixed H/He beam with a flux of 3.7 × 1021 m−2 s−1. Post-mortem analysis showed that the roughened surface did not alter the H/He induced surface modifications. In contrast to that on the test specimens that exhibited crack formation, phenomena such as bubble creation along the crack edge, formation of a shallow layer of nano-structures covering the crack opening, and the emerging of a porous structure which partially fills the crack are observed.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000382421900030
%R 10.1016/j.fusengdes.2016.03.035
%U https://juser.fz-juelich.de/record/819877