Accession Number : AD0282140

Title :   STUDIES OF ELECTRON TUBE MATERIALS AND THERMIONIC EMISSION PROCESSES.

Descriptive Note : Scientific rept. no. 9, 1 Apr-30 Jun 62.

Corporate Author : GENERAL TELEPHONE AND ELECTRONICS LABS INC BAYSIDE N Y

Report Date : 30 JUN 1962

Pagination or Media Count : 25

Abstract : The thermionic emission properties of ultra-pure nickel-base oxide cathodes in the clean test diode are being investigated. The sublimation from ultra-pure and N4 nickel-base barium oxide cathodes has been measured as a function of cathode temperature. The ion source was modified, resulting in an over-all sensitivity gain but slightly poorer resolution. The electron emission microscopy results previously observed for an ultra-pure nickel-base triple oxide cathode in a 21-inch diameter sealed-off emission microscope tube have been repeated under more or less identical experimental conditions in the demountable and constantly pumped tube in order to compare the operation of the cathode with that in a less favorable vacuum environment. The results are essentially the same. (Author)

Descriptors :   *OXIDE CATHODES, *THERMIONIC EMISSION, BARIUM, BARIUM COMPOUNDS, CALIBRATION, CATHODES (ELECTRON TUBES), COATINGS, DIODES, ELECTRON MICROSCOPY, ELECTRON TUBES, EVAPORATION, GASES, IONS, MASS SPECTROSCOPY, MATERIALS, MOLECULAR BEAMS, MOLYBDENUM, NICKEL, OXIDES, PLATINUM, SUBLIMATION, TEMPERATURE, TESTS, THIN FILMS (STORAGE DEVICES)

Distribution Statement : APPROVED FOR PUBLIC RELEASE