%0 Journal Article
%A Heinola, K.
%A Ahlgren, T.
%A Brezinsek, S.
%A Vuoriheimo, T.
%A Wiesen, S.
%T Modelling of the effect of ELMs on fuel retention at the bulk W divertor of JET
%J Nuclear materials and energy
%V 19
%@ 2352-1791
%C Amsterdam [u.a.]
%I Elsevier
%M FZJ-2019-02756
%P 397 - 402
%D 2019
%X Effect of ELMs on fuel retention at the bulk W target of JET ITER-Like Wall was studied with multi-scale calculations. Plasma input parameters were taken from ELMy H-mode plasma experiment. The energetic intra-ELM fuel particles get implanted and create near-surface defects up to depths of few tens of nm, which act as the main fuel trapping sites during ELMs. Clustering of implantation-induced vacancies were found to take place. The incoming flux of inter-ELM plasma particles increases the different filling levels of trapped fuel in defects. The temperature increase of the W target during the pulse increases the fuel detrapping rate. The inter-ELM fuel particle flux refills the partially emptied trapping sites and fills new sites. This leads to a competing effect on the retention and release rates of the implanted particles. At high temperatures the main retention appeared in larger vacancy clusters due to increased clustering rate.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000470746100063
%R 10.1016/j.nme.2019.03.013
%U https://juser.fz-juelich.de/record/862444