STUDIES OF ELECTRON TUBE MATERIALS AND THERMIONIC EMISSION PROCESSES.
Abstract
The thermionic emission properties of ultra-pure nickel-base oxide cathodes in a clean test diode were investigated. The effects of electrolytic activation, life-test conditions and gas ambient on thermionic emission were evaluated. The emission properties of pure nickel-base cathodes are compared with cathodes containing known im purities in the base metal or the coating and the effects of these impurities on emission are evaluated. The influence of the anode on cathode activation is shown. Measurements of the sub limation from various metal-base oxide cathodes are described. A Knudsen cell mass spectrometer system was designed and assembled for the study of high-temperature reactions between tube materials. The Knudsen cell was operated in the mass spectrometer at temperatures up to 2600 K, and the system was calibrated on the basis of published data of vapor pressure versus tempera ture for pure silver. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1963
- Accession Number
- AD0413928
Entities
People
- A. Sandor
- John V. Florio
- Robert A. Wallace