TY  - JOUR
AU  - Lemahieu, Nathan
AU  - Balden, Martin
AU  - Elgeti, Stefan
AU  - Greuner, Henri
AU  - Linke, Jochen
AU  - Maier, Hans
AU  - Pintsuk, Gerald
AU  - Wirtz, Marius
AU  - Van Oost, Guido
AU  - Noterdaeme, Jean-Marie
TI  - H/He irradiation on tungsten exposed to ELM-like thermal shocks
JO  - Fusion engineering and design
VL  - 109-111
SN  - 0920-3796
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2016-05453
SP  - 169 - 174
PY  - 2016
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000382421900030
DO  - DOI:10.1016/j.fusengdes.2016.03.035
UR  - https://juser.fz-juelich.de/record/819877
ER  -