TY  - JOUR
AU  - Lemahieu, N.
AU  - Greuner, H.
AU  - Linke, Jochen
AU  - Maier, H.
AU  - Pintsuk, Gerald
AU  - Wirtz, Marius
AU  - Van Oost, Guido
AU  - Noterdaeme, J.-M.
TI  - Thermal Shock Behaviour of H and H/He-Exposed Tungsten at High Temperature
JO  - Physica scripta
VL  - T167
SN  - 0031-8949
CY  - Bristol
PB  - IoP Publ.
M1  - FZJ-2016-02295
SP  - 014008
PY  - 2016
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000383504700009
DO  - DOI:10.1088/0031-8949/T167/1/014008
UR  - https://juser.fz-juelich.de/record/808662
ER  -