Accession Number : AD0430919

Title :   RESEARCH STUDY FOR INCREASING THE SENSITIVITY OF PHOTOEMITTERS.

Descriptive Note : Quarterly technical rept. no. 7, 1 July 6330 Sep 63,

Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON NJ

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

Report Date : 21 OCT 1963

Pagination or Media Count : 33

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)

Descriptors :   (*MOLECULAR BEAMS, ANTIMONY), (*PHOTOCATHODES, MOLECULAR BEAMS), (*ELECTRODEPOSITION, PHOTOCATHODES), ELECTRON GUNS, CESIUM, SODIUM, MANUFACTURING, X RAY DIFFRACTION, SENSITIVITY, CHEMICAL ANALYSIS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE