Observations of Temperature-Induced Material Transformations in Impregnated Scandate Cathode Samples During in situ Heating in the SEM

Huanhuan Bai, T. John Balk

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

1 Scopus citations

Abstract

Dispenser cathodes operate in a high vacuum environment when used as thermionic emitters in vacuum electron devices. Although significant materials research has been performed on cathodes in recent years, limitations of techniques or instrumentation have made it difficult to obtain real-time observations of dispenser cathodes in a dynamic (heated) state using high-resolution techniques such as advanced scanning electron microscopy. In the present study, to observe and better understand how cathode materials and morphologies were created, the authors performed high temperature in situ heating experiments on impregnated cathode pellet pieces in an SEM, to monitor W faceting and impregnant behavior during heating, in real time.

Original languageEnglish
Title of host publication2022 23rd International Vacuum Electronics Conference, IVEC 2022
Pages238-239
Number of pages2
ISBN (Electronic)9781665443258
DOIs
StatePublished - 2022
Event23rd International Vacuum Electronics Conference, IVEC 2022 - Monterey, United States
Duration: Apr 25 2022Apr 29 2022

Publication series

Name2022 23rd International Vacuum Electronics Conference, IVEC 2022

Conference

Conference23rd International Vacuum Electronics Conference, IVEC 2022
Country/TerritoryUnited States
CityMonterey
Period4/25/224/29/22

Bibliographical note

Publisher Copyright:
© 2022 IEEE.

Keywords

  • faceting
  • impregnant
  • in situ heating
  • scandate cathode

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • Instrumentation

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