The choice of cathode material in a hot
โ
PE Gear
๐
Article
๐
1976
๐
Elsevier Science
๐
English
โ 784 KB
The paper outlines the problems encountered in using a hot cathode ionization gauge with particular reference to the tungsten cathode. The theory of thermionic emission from metals and semiconductors is mentioned as is activation and poisoning of surfaces. Low temperature cathodes are discussed wit