Advanced nano-scandate cathode

Daniel E. Bugaris, Claudia Goggin, Kerry Baker, John Balk, Daniel Busbaher, Jack Tucek

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Scandate cathodes have the potential to replace conventional cathodes because of their improved emission characteristics. Nevertheless, it remains a challenge in this field to produce scandate cathodes with uniform surface emission in a reproducible manner. In this study, we report on scandate cathode emitters prepared from a novel nano-scandia/tungsten composite powder. Processing improvements have been developed to yield high-quality emitter surfaces. Emission testing demonstrates a greater than 200°C decrease (improvement) in knee temperature versus the standard M-type cathode. There is an on-going effort to quantify the work function of the cathode surface prior to and following activation.

Original languageEnglish
Title of host publication2020 IEEE 21st International Conference on Vacuum Electronics, IVEC 2020
Pages79-80
Number of pages2
ISBN (Electronic)9781538682883
DOIs
StatePublished - Oct 19 2020
Event21st IEEE International Conference on Vacuum Electronics, IVEC 2020 - Monterey, United States
Duration: Oct 19 2020Oct 22 2020

Publication series

Name2020 IEEE 21st International Conference on Vacuum Electronics, IVEC 2020

Conference

Conference21st IEEE International Conference on Vacuum Electronics, IVEC 2020
Country/TerritoryUnited States
CityMonterey
Period10/19/2010/22/20

Bibliographical note

Funding Information:
This work was financially supported by Engi-Mat Co. (formerly nGimat LLC) through U.S. Navy STTR contract N00253-17-C-0014.

Publisher Copyright:
© 2020 IEEE.

Keywords

  • Knee temperature
  • Scandate cathode
  • Scandia nanopowder
  • Tungsten
  • Work function

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Instrumentation

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