Accession Number : AD0439853


Title :   RESEARCH STUDY FOR INCREASING THE SENSITIVITY OF PHOTOEMITTERS.


Descriptive Note : Quarterly technical rept. no. 9, 1 Jan 6431 Mar 64,


Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON N J


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


Report Date : 15 Apr 1964


Pagination or Media Count : 1


Abstract : Attempts to produce photocathodes by a one-step process have been successful in leading to a one-step process for (Na2KSb) cathodes. Preliminary results from life tests on cathodes exposed to tube parts which have not been cesiated indicate that under these conditions, life is limited. Electron diffraction studies of photocathodes deposited on room temperature substrates by sequential deposition from molecular beams indicate that a good multi-alkali crystalline deposit does not result and probably explains why good photocathodes are not produced by this method. Promising results are reported of experiments where simultaneous deposition of the cathode constituents by the molecular beam method is made. Preliminary results of experiments on photocathodes using a quartz crystal oscillator as a mass detector and on cathode formation by flash evaporation are reported. An attempt to observe field induced photoemission from germanium p-n junctions was not successful.(Author)


Descriptors :   PHOTOCATHODES , LIFE EXPECTANCY(SERVICE LIFE) , SENSITIVITY , BISMUTH COMPOUNDS , CESIUM COMPOUNDS , PERFORMANCE(ENGINEERING) , ELECTRON DIFFRACTION , MEASURING INSTRUMENTS


Distribution Statement : APPROVED FOR PUBLIC RELEASE