• DocumentCode
    79565
  • Title

    Life Test Studies on Dispenser Cathode With Dual-Layer Porous Tungsten

  • Author

    Mingchen Zhang ; Yan-Wen Liu ; Shiji Yu ; Yu Wang ; Honglai Zhang

  • Author_Institution
    Inst. of Electron., Beijing, China
  • Volume
    61
  • Issue
    8
  • fYear
    2014
  • fDate
    Aug. 2014
  • Firstpage
    2983
  • Lastpage
    2988
  • Abstract
    This paper introduces a newly developed dual-layer porous tungsten dispenser cathode, which can meet the growing requirements on both life and current density. In comparison with the conventional dispenser cathodes, the new-type dispenser cathodes have higher emission current density, lower evaporation rate and longer lifetime. According to the results of the life tests and the related analysis, their longest lifetime at a 1.5 A/cm2 current density under 974 °Cbr is estimated to be over 1.9 ×105 h.
  • Keywords
    cathodes; current density; emission; evaporation; life testing; porous materials; tungsten; W; dispenser cathode; dual-layer porous tungsten; emission current density; evaporation rate; life test studies; Cathodes; Coatings; Current density; Reliability; Temperature measurement; Tungsten; Dispenser cathode; life test; space traveling wave tube (TWT); space traveling wave tube (TWT).;
  • fLanguage
    English
  • Journal_Title
    Electron Devices, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9383
  • Type

    jour

  • DOI
    10.1109/TED.2014.2323258
  • Filename
    6848768
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=79565