Thermionic Cathode Coating by OMCVD (Organo-Metallic Chemical Vapor Deposition).
Abstract
The present invention relates to a new and improved thermionic cathode and, more particularly, to a thermionic cathode having a novel coating thereon and to the method of forming the coating. High power electron tube devices, such as travelling wave tubes and other microwave generators, require electron emitters or cathodes having very high electron emission densities. For example, emission densities of approximately 15 Amperes/2 sq. cm. and greater are required. Failure of the cathode of a tube always results in tube failure. Since cathodes cannot be replaced without rebuilding the entire tube, early failure of a tube's cathode can be a costly event. In many tubes, lifetimes of tens of thousands or more hours must be achieved in order for the tube to an economically viable device.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 1987
- Accession Number
- ADD012838
Entities
People
- Alan D. Berry
- Arnold S. Shih
- Charles Hor
- Christian Marrian
- George Haas
Organizations
- United States Department of the Navy