Barium evaporation and film degradation of osmium-coated cathode

Vacuum Electron Sources Conference（2014）

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摘要

This paper describes the experiments for the evaporation and film degradation of osmium-coated cathode. Evaporating rate and under-heated characters were tested, and SEM & EDS were used. Barium evaporation is the main factor of cathode life degradation under 1080 C. The model of failure caused by evaporation was established.

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关键词

barium,cathodes,coatings,osmium,scanning electron microscopy,vacuum deposition,ba,eds,os,sem,barium evaporation,film degradation,osmium-coated cathode

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