High-Performance Scandate Cathode

Daniel E. Bugaris, Claudia Goggin, Xiaomeng Zhang, John Balk, Daniel Busbaher, Jack Tucek

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

3 Scopus citations

Abstract

Scandate cathodes have long attracted attention due to their higher emission current density, apparent low work function, and anticipated improved longevity compared to conventional cathodes. However, scandate cathodes have not been applied as extensively as their potential would imply. In this study, the compositional homogeneity of a scandia/tungsten composite powder was investigated by scanning electron microscopy, X-ray energy dispersive spectroscopy, and X-ray photoelectron spectroscopy. From these techniques, a sample providing the optimal coverage of tungsten by scandia particles was then chosen. A cathode fabricated from this sample displayed a greater than 200°C decrease (improvement) in knee temperature versus the standard M-type cathode.

Original languageEnglish
Title of host publication2019 International Vacuum Electronics Conference, IVEC 2019
ISBN (Electronic)9781538675342
DOIs
StatePublished - Apr 2019
Event2019 International Vacuum Electronics Conference, IVEC 2019 - Busan, Korea, Republic of
Duration: Apr 28 2019May 1 2019

Publication series

Name2019 International Vacuum Electronics Conference, IVEC 2019

Conference

Conference2019 International Vacuum Electronics Conference, IVEC 2019
Country/TerritoryKorea, Republic of
CityBusan
Period4/28/195/1/19

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

Keywords

  • knee temperature
  • scandate cathode
  • scandia nanopowder
  • tungsten

ASJC Scopus subject areas

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

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