Accession Number:

ADA099413

Title:

Scanning Auger and Work-Function Measurements Applied to Dispenser Cathodes.

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA CHEMISTRY AND PHYSICS LAB

Personal Author(s):

Report Date:

1981-05-01

Pagination or Media Count:

29.0

Abstract:

A method to perform spatially resolved work-function measurements has been developed using a modified scanning Auger microprobe SAM. The basis of the method is that patches of different work function give rise to different onsets of secondary electron emission. The combined SAM-work function measurement method permits a microscopic correlation of emissive or surface dipole properties with elemental composition. The system permits a surface spatial resolution of 0.2 micrometer provided by the focused incident electron beam, and a work-function resolution of better than 0.05 eV. Results are presented for elemental samples, which were used as a test of the work-function mapping ability. Some initial results on dispenser cathode surfaces are also presented. Author

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE