Home > Publications database > Modelling of the effect of ELMs on fuel retention at the bulk W divertor of JET > print

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100 1 _ |a Heinola, K.
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245 _ _ |a Modelling of the effect of ELMs on fuel retention at the bulk W divertor of JET
260 _ _ |a Amsterdam [u.a.]
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520 _ _ |a 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.
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700 1 _ |a Ahlgren, T.
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700 1 _ |a Brezinsek, S.
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700 1 _ |a Vuoriheimo, T.
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700 1 _ |a Wiesen, S.
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773 _ _ |a 10.1016/j.nme.2019.03.013
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