Accession Number : AD0452779


Title :   RESEARCH STUDY FOR INCREASING THE SENSITIVITY OF PHOTOEMITTERS


Descriptive Note : Quarterly technical rept. no. 11, 1 Jul-30 Sep 1964


Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON NJ


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


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/452779.pdf


Report Date : 22 Oct 1964


Pagination or Media Count : 51


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. Sbfilms evaporated from PtSb-beads have higher conductivity and lower light transmission than films evaporated from pure Sb-beads. They also can be oxidized. S-20 cathodes formed on oxidized Sb-films and subjected to a Na-Sb alternation at 220 C have shown higher infrared response than any earlier cathodes. Attempts to produce S-20 cathodes by simultaneous deposition from molecular beam sources yielded a multialkali cathode of low sensitivity. Preliminary experiments on improved molecular beam sources and a control circuit were made. The modified reflection electron diffraction tube was successfully tested using gold as a sample material.


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


Subject Categories : Electrooptical and Optoelectronic Devices
      Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE