Fundamental Research on Emission Materials and Surface Physics.

Abstract

A value of 6.9 plus or minus 0.5 eV has been measured for the work function of a (211) plane of thermally smoothed tungsten field emitter, using an improved probe-hole technique. A compensation is shown to exist between the Richardson constants for recrystallized W and Mo filaments, which may be explained by a Gaussian distribution of fundamental patches superimposed on the micropatches. Periodic deviations in the Schottky effect for Nb, Ta and Ta-on-Nb yield a Wa which is at variance with the Miller-Good theory. A more advanced many-body analysis is needed to explain the results. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 10, 1971
Accession Number
AD0723855

Entities

People

  • Alex A. Petrauskas
  • Edward A. Coomes

Organizations

  • University of Notre Dame

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Compensation
  • Emission
  • Emitters
  • Filaments
  • Functions (Mathematics)
  • Gaussian Distributions
  • Materials
  • Mathematics
  • Tungsten
  • Work Functions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Plasma Physics.
  • Statistical inference.