Unipolar arcing at advanced firstwall surfaces with selfhealing

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Unipolar arcing at advanced first-wall surfaces with self-healing layers MPT/P 7 -34 Appearance of

Unipolar arcing at advanced first-wall surfaces with self-healing layers MPT/P 7 -34 Appearance of advanced first-wall surface layer materials such as - W-fuzz – tungsten nanowires structure [S. Kajita et al 2007 Nucl. Fusion 47 1358] - Liquid Li filled capillary-porous structure [Y. Hirooka et al 2010 Nucl. Fusion 50 077001 ] Observation of arcing promotion by intense pulsed plasma action of ELMs at surface-layer structure - Arcing at W-micro-layer coated tiles under the ELMs at Asdex-Upgrade tokamak [V. Rohde et al 2011 J. Nucl. Mater. 415 (1) S 46–S 50] - Arcing at W-fuzz at pulsed laser and plasma action at NADGIS and other linear simulators [S. Kajita et al 2009 Nucl. Fusion 49 032002 ; Aussems D. U. B. et al. 2014 “The occurrence and damage of unipolar arcing on fuzzy tungsten” Journal of Nuclear Materials] Bridge between the recent experiment and the vacuum arc theory, including the specific of arcing at thinfilms Proposition from the explosive-pulses (ectons) model and experimental observation – LHD + NAGDIS [S. A. Barengolts, G. A. Mesyats, and M. M. Tsventoukh 2010 Nucl. Fusion 50 125004 ; Tokitani M. et al 2011 Nuclear Fusion 51 102001 ; Hwangbo D. et al 2014 Results in Physics 4 33 -39] Burning of the arc cathode spot within the localized track – not over the whole surface substantially covered by W-fuzz