STUDIES OF PRIMARY ELECTRON SOURCES
Abstract
An experimental system for studying the controlled activation and deactivation of alkaline-earth metal oxide cathodes is described. The activation rate can be controlled by the addition or removal of carbon as a reducing agent, while the cathode is independently exposed to a deactivating gas. Results of studies of long-pulse and dc emission changes from oxide-cathodes are presented, and the measurement system is described. Photoelectric measurements on a BaO coated cathode in conjunction with thermionic pulse emission measurements are described. The data obtained indicate a relationship between the thermionic and photoelectric emission. Experiments investigating the enhancement of thermionic emission by ultraviolet light are reported. The procedure used to produce BaO thin films on the standard cathode base structure is outlined and photoelectric yield curves are presented. A study of electron tunneling through thin insulating films was initiated. Methods for preparing experimental samples suitable for the measurements were developed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1962
- Accession Number
- AD0273875
Entities
People
- D. E. Anderson
Organizations
- University of Minnesota