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INTRODUCTION: In the stand ard picture of plasm a w all interaction , arcs are not taken into account as erosion source: in the 80 th it w as show n that for carbon physical and chem ical sputtering d om inate and arcs are only triggered d uring unstable plasm a phases w ith enhan ced MH D activity . On the other hand arc traces are observed in all present fusion d evices. Due to the transition to m etal plasm a facing com ponents (PFCs) the role of arcing on erosion has to be reconsid ereddoi:10.1016/j.nme.2017.09.004 fatcat:sslp6eduafbzvepkr3jg2vxknq