Accession Number : AD0446738

Title :   RESEARCH STUDY FOR INCREASING THE SENSITIVITY OF PHOTOEMITTERS.

Descriptive Note : Quarterly technical rept. no. 10, 1 Apr30 June 64,

Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON NJ

Personal Author(s) : Simon, R. E. ; Sommer, A. H. ; McCarroll, W. H.

Report Date : 23 JUL 1964

Pagination or Media Count : 9

Abstract : Efforts were continued on a program to investigate the physical and structural properties of photoemitting materials, to study and develop processing procedures for producing improved photocathodes, and to investigate the possibilities of field induced photoemitters. Various methods of introducing Na at 160 C during the S-20 process produced good Na2KSb cathodes but S-20 cathodes with low red response. A new S-20 process in which an oxidized Sb-base layer is used was studied. Differences were noted between Sb deposits evaporated from Sband PtSb-beads. Experimental evidence was produced to show that the stoichiometric composition of multi-alkali cathodes is critical to within 1 to 2%. Life-tests on S-20 cathodes exposed to uncesiated glass and metal parts indicate stability of this type of cathode over periods of months. (Author)

Descriptors :   *PHOTOCATHODES, *PHOTOELECTRIC EFFECT, MANUFACTURING, SEMICONDUCTORS, PHOTOELECTRIC MATERIALS, SODIUM COMPOUNDS, POTASSIUM COMPOUNDS, ANTIMONY COMPOUNDS, FIELD EMISSION, PROCESSING, OXIDES, VAPOR PLATING, METAL COATINGS, ALKALI METAL COMPOUNDS, LIFE EXPECTANCY(SERVICE LIFE), CRYSTAL HOLDERS, QUARTZ RESONATORS, CRYSTAL OSCILLATORS, CRYSTAL LATTICES, SILICON, CESIUM, SENSITIVITY, ELECTRON DIFFRACTION, MOLECULAR BEAMS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE