• DocumentCode
    2006575
  • Title

    Emission studies on reservoir cathodes

  • Author

    Vancil, Bernard ; Schmidt, Victor ; Monson, Tyrus ; Brodie, Ivor ; Ohlinger, Wayne ; Shaw, Jonathan

  • Author_Institution
    e beam, Inc., Beaverton, OR
  • fYear
    2008
  • fDate
    22-24 April 2008
  • Firstpage
    165
  • Lastpage
    166
  • Abstract
    We report improved emission from our miniature reservoir cathodes due to changes in emission material composition and processes. Also, the diffuser plug porosity and composition were adjusted. The activity curves on diode testers now exhibit knee temperatures of 970deg CB at 5 A/cm2. This is slightly above the ldquoMrdquo impregnated cathodes used as controls. Activation time was also reduced. The main improvement was introduction of sub-micron tungsten as activator in the reservoir and improved processes to protect emission material from water vapor. We present the data and describe the compositional and process changes that were made.
  • Keywords
    chemical analysis; thermionic cathodes; cathode emission; diffuser plug porosity; diode testers; emission material; miniature reservoir cathodes; submicron tungsten; water vapor; Cathodes; Composite materials; Diodes; Knee; Plugs; Protection; Reservoirs; Temperature; Testing; Tungsten; Cathode; reservoir cathode; thermionic;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Vacuum Electronics Conference, 2008. IVEC 2008. IEEE International
  • Conference_Location
    Monterey, CA
  • Print_ISBN
    978-1-4244-1715-5
  • Type

    conf

  • DOI
    10.1109/IVELEC.2008.4556471
  • Filename
    4556471
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2006575