Ignition and sustainment of the explosive electron emission cyclic pulses — Ectons by plasma-surface interaction

摘要

The ignition and sustainment of the explosive electron emission cycles — ectons has been considered from point of view plasma-surface interactions. Intense plasma action onto the surface (in form of transient events such as ELMs) as well as fine structure of surface (such as W-fuzz layers and other film-like structures) have been found to promote ignition and sustainment of the explosive electron emission cycles — ectons. Easy erosion of such a film structures and the readiness of the explosive electron emission on them, in turn, indicates probably a lower specific erosion due to the arcing (e.g. less droplets) in comparison with the solid targets.