STUDIES OF ELECTRON TUBE MATERIALS AND THERMIONIC EMISSION PROCESSES.
Abstract
The thermionic emission properties of ultra-pure nickel-base oxide cathodes in the clean test diode are being investigated. The sublimation from ultra-pure and N4 nickel-base barium oxide cathodes has been measured as a function of cathode temperature. The ion source was modified, resulting in an over-all sensitivity gain but slightly poorer resolution. The electron emission microscopy results previously observed for an ultra-pure nickel-base triple oxide cathode in a 21-inch diameter sealed-off emission microscope tube have been repeated under more or less identical experimental conditions in the demountable and constantly pumped tube in order to compare the operation of the cathode with that in a less favorable vacuum environment. The results are essentially the same. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1962
- Accession Number
- AD0282140