Accession Number : AD0491907

Title :   OXIDE CATHODE AND PRIMARY GRID EMISSION STUDIES.

Descriptive Note : Monthly rept. no. 19 for Nov 48,

Corporate Author : WESTINGHOUSE ELECTRIC CORP BLOOMFIELD NJ LAMP DIV

Personal Author(s) : McNall, J. W. ; Ivey, H. F. ; Young, R. G.

Report Date : 07 DEC 1948

Pagination or Media Count : 8

Abstract : Oscillograms of electrode currents were taken and visual observations were made on several 715B tubes under arcing conditions in order to locate the causes of the two general types of arcs described herein. The results of tests on two tubes are given. The thermionic emission from ''clean'' 18-8 stainless steel was studied preliminary to study of its emission when contaminated by the material evaporated from an oxide cathode. Of the possible grid materials investigated thus far, when compared on a basis of emission for a given power input carbonized nickel is the best, with zirconium-clad molybdenum and gold-plated molybdenum following in that order. (Author)

Descriptors :   (*OXIDE CATHODES), (*THERMIONIC EMISSION), ELECTRON TUBES, NICKEL, MOLYBDENUM, PLATING, GOLD, ZIRCONIUM, CARBON, STAINLESS STEEL, TUNGSTEN, CONTAMINATION, EMISSIVITY.

Distribution Statement : APPROVED FOR PUBLIC RELEASE