Accession Number:

AD0491918

Title:

OXIDE CATHODE AND PRIMARY GRID EMISSION STUDIES

Descriptive Note:

Monthly rept. no. 7, Nov 47

Corporate Author:

WESTINGHOUSE ELECTRIC CORP BLOOMFIELD NJ LAMP DIV

Personal Author(s):

Report Date:

1947-12-03

Pagination or Media Count:

15.0

Abstract:

Methods have been developed for making relative gas pressure measurements in 715 AB tubes. The electrostatic fields at the cathode of these tubes have also been investigated. Both these points are of interest concerning the electrical breakdown of these tubes under high voltage pulsed operation. Preliminary investigations seem to indicate that breakdown occurs during the pulse, when the applied voltage is lowest. Additional improvements have also been made in the test equipment. The search for a suitable anode material for the special tube for x-ray analysis of the material evaporated from an oxide cathode has been continued, but the problem is not yet solved. Thermionic emission measurements have been made on Svea metal both before and after contamination by an oxide cathode. Before contamination the emission was much greater than that reported for clean pure iron and could not be reduced to any great extent by heat treatment. Extraordinarily large A values were obtained. Svea metal can be activated by exposure to an oxide cathode, but the rate of activation seems considerably less than that for tungsten. Author

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE