Accession Number : AD0282245

Title :   PHOTOCOCAT, A PHOTOEMISSIVE COLD CATHODE.

Descriptive Note : Supplementary rept.

Corporate Author : NUCLEAR CORP OF AMERICA DENVILLE N J

Personal Author(s) : Sclar,Nathan

Report Date : DEC 1962

Pagination or Media Count : 15

Abstract : The photococat approach was analyzed for the case where the cold light source is a miniature glow which activates a S-11 photoemissive surface. The calculations indicate an electron emission efficiency of the same order of magnitude as the oxide thermionic cathode with possibilities for even higher efficiencies if a regenerative light utilization is achieved. Emission levels up to up to the range of 10 milliamperes from a single miniature source are indicated. Five experimental photococats were synthesized and their emission properties measured. Electron emission at levels up to 10 microamperes were measured with steady emission after seasoning at the two microamperes level. These emission levels are believed due to non optimum photoemissive layers and to the Joulean heat generated in the photo surface which can be avoided by the use of low resistivity substrates. (Author)

Descriptors :   (*PHOTOTUBES), (*PHOTOEMISSION), (*COLD CATHODE TUBES), ELECTRON TUBES, ELECTRON BEAMS, MINIATURE ELECTRON TUBES, ELECTRON BEAMS, MINIATURE ELECTRON TUBES, LUMINESCENCE, LIGHT, SURFACE PROPERTIES, SENSITIVITY, RADIOACTIVE ISOTOPES, PHOSPHORS, ELECTRIC CURRENTS, DESIGN, PROCESSING, ELECTROPLATING, METAL FILMS, MEASUREMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE