Accession Number : AD0458156

Title :   RESEARCH STUDY FOR INCREASING THE SENSITIVITY OF PHOTOEMITTERS.

Descriptive Note : Quarterly technical rept. no. 12, 1 Oct-31 Dec 64,

Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON NJ

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

Report Date : 22 JAN 1965

Pagination or Media Count : 60

Abstract : The comparative study of Sb deposits from Sb and PtSb beads has been completed. Photoemission and light absorption of K3Sb have been investigated as a function of the Sb substrate. Experiments with S-20 cathodes formed on oxidized Sb substrates have been continued. K3Sb photocathodes have been prepared by the simultaneous deposition from molecular beams with sensitivities comparable to those processed conventionally. A new all-metal molecular gun with fast response and good stability has been developed. A new circuit for automatic control of the deposition from molecular beams has been constructed. Electron diffraction studies of S-1 cathodes have confirmed the presence of Ag and Cs2O in the finished cathodes. Alkali ion beams have been shown to be a promising source of alkali metal for photocathode preparation. Structural analysis of K3Sb as a function of processing has been initiated. Vapor etching and diffusion of Ge to produce p-n junctions for field induced photoemission have been carried out. (Author)

Descriptors :   (*PHOTOELECTRIC MATERIALS, SEMICONDUCTORS), (*PHOTOCATHODES, MANUFACTURING), SEMICONDUCTING FILMS, ANTIMONY, PLATINUM COMPOUNDS, ANTIMONY COMPOUNDS, POTASSIUM, GERMANIUM, FIELD EMISSION, PROCESSING, OXIDES, INFRARED OPTICAL MATERIALS, MOLECULAR BEAMS, ELECTRON DIFFRACTION, CESIUM COMPOUNDS, DIFFUSION, ALKALI METAL COMPOUNDS, SILVER COMPOUNDS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE