UNIFORM WORK FUNCTION CATHODE STUDIES FOR THERMIONIC CONVERTERS
Abstract
Efforts were continued on a study program to improve the efficiency of thermionic converters which have nonplanar geometries. Specifically, the investigation concerns the production of nonplanar cathodes having more uniform work functions and surface characteristics than are obtained with standard cathode fabrication techniques. A thermionic emission electron microscope for observing work function uniformity was constructed. Arc cast, single crystal, and vapor deposited molybdenum cathodes were examined with the microscope. Active spots due to electropolishing were observed on the (110) face of the single crystal. A vapor deposited cathode was found to have areas of uniform work function. A brief summary is given of the over-all course of the first year of the program and its most significant achievements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1963
- Accession Number
- AD0414502
Entities
People
- M. N. Huberman