RESEARCH STUDIES TO IMPROVE THE SPECTRAL RESPONSE AND EFFICIENCY OF PHOTOEMITTERS.
Abstract
Experiments were continued to study the role of Cs in the S-20 cathode by means of controlled molecular beams and of quartz oscillator substrates to determine minute weight changes. Systematic modifications of the S-20 activation process were continued. Attempts were made to increase the p-type nature of Cs3Sb by the addition of Ge and Sn. The multi-alkali cathode of composition (Rb,Cs)3Sb was further investigated. Attempts to make Na2KSb cathodes using molecular beams were not successful because of difficulties with the apparatus. A new alkali gun was designed and tested successfully and will be used in future processing experiments. Lattice constant data for (Rb,Cs)3Sb were obtained but no Rb2CsSb compound formation was observed. No difference in Cs3Sb formed on MnO and on carbon substrates was found by electron diffraction. The non-cubic phase was found to be the predominant phase in thick Cs3Sb cathodes. Ternary compounds chosen by the concept of structural analogy were found to have an increased sensitivity over binary alkali antimonide cathodes. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 23, 1966
- Accession Number
- AD0479812
Entities
People
- Alfred H. Sommer
- Ralph E. Simon
- William H. Mccarrol
Organizations
- Sarnoff Corporation