RESEARCH STUDY FOR INCREASING THE SENSITIVITY OF PHOTOEMITTERS.
Abstract
A molecular beam antimony source has been developed. The first attempts have been made to form multi-alkali cathodes by quasi-simultaneous deposition of alkali metals on a rotating substrate, but definative results have not yet been obtained. Processing experiments on S-20 cathodes showed that a higher ratio of red to blue response can be obtained by using thicker cathode films. The response beyond 8000 A was found to vary greatly from tube to tube. So far, it has not been possible to identify the parameter which determines the long wavelength threshold. Chemical and X-ray analyses have shown that composition of the K-Cs-Sb cathode is K2CsSb and that it is a unique point i the cubic solid solution extending from Cs3Sb to K2.08Cs0.92Sb. The high energy electron diffraction apparatus was used successfully to follow the formation of a multi-alkali cathode by conventional processing from the initial deposity of antimony to the final composition of Na2KSb. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 21, 1963
- Accession Number
- AD0430919
Entities
People
- A. H. Sommer
- R. E. Simon
- W. H. Mccarroll
Organizations
- Sarnoff Corporation