Ablation of electrode surfaces in high power diodes

摘要

The ablation of electrode surfaces has been observed for several materials illuminated by radiation from an imploding wire array. The experiments were done on the PITHON 5hyphen;TW generator. A plasma boundary atne=5times;1018/cm3expands at velocities up to 10 cm/mgr;s from the surface. Calculations suggest early vacuumhyphen;ultraviolet radiation ablates the electrode surface. Hydrogen is the dominant element forming a coating on the electrode surface.