TY  - JOUR
AU  - Heinola, K.
AU  - Ahlgren, T.
AU  - Brezinsek, S.
AU  - Vuoriheimo, T.
AU  - Wiesen, S.
TI  - Modelling of the effect of ELMs on fuel retention at the bulk W divertor of JET
JO  - Nuclear materials and energy
VL  - 19
SN  - 2352-1791
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2019-02756
SP  - 397 - 402
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000470746100063
DO  - DOI:10.1016/j.nme.2019.03.013
UR  - https://juser.fz-juelich.de/record/862444
ER  -