Accession Number:

AD0420398

Title:

APPLIED RESEARCH ON FIELD EMISSION CATHODES.

Descriptive Note:

Quarterly rept. no. 1, 15 June-15 Sep 63,

Corporate Author:

FIELD EMISSION CORP MCMINNVILLE OR

Personal Author(s):

Report Date:

1963-09-15

Pagination or Media Count:

25.0

Abstract:

Research concerns a study of field emission cathodes and their eventual development to a practical electron source. The study of large emitters with the individual capability for emission of current in the several ampere range is currently being stressed. Progress toward establishment of an adequate testing facility and development of the necessary technology for efficient study of such cathodes is reviewed, and preliminary experimental results are reported. Development of an electron optical system for use with large emitters and the construction of a specific electron lens are discussed. Study of reduction of the divergence of emission from a tungsten cathode by means of a preferentially absorbed zirconium coating was continued and earlier quantitative results were repeated. Potential usefulness of W-Zr alloy emitters is being re-examined in the light of recent information concerning the role of oxygen in the absorption of Zr on W, and behavior of a magnesium coating on tungsten was studied with an aim toward better basic understanding of preferential absorption processes. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE