• DocumentCode
    2924893
  • Title

    Improved electron emission from W-Ir dispenser cathodes

  • Author

    Ravi, Meduri ; Kumar, K. Santosh ; Devi, P. Durga ; Bhat, K. Seetharama ; Kumar, Lalit

  • Author_Institution
    Microwave Tube R&D Centre, Bangalore, India
  • fYear
    2012
  • fDate
    24-26 April 2012
  • Firstpage
    465
  • Lastpage
    466
  • Abstract
    W-Ir dispenser cathodes have been fabricated with lithium oxide doped impregnant mix and tested for their emission characteristics in a closely spaced diode configuration. With Li2O doping, emission current density improved from 7.5 to 32 A/cm2 at 1075°C. 32000 hours of life as on date has been measured.
  • Keywords
    cathodes; current density; iridium; lithium compounds; semiconductor diodes; thermionic electron emission; tungsten; Li2O; W-Ir; closely spaced diode configuration; dispenser cathodes; emission characteristics; emission current density; improved electron emission; lithium oxide doped impregnant mix; temperature 1075 degC; thermionic electron emission; time 32000 hour; Barium; Cathodes; Current measurement; Lithium; Temperature measurement; Tungsten; Voltage measurement; Dispenser Cathodes; Mixed Metal Matrix; Thermionic emission;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Vacuum Electron Sources Conference (IVESC), 2012 IEEE Ninth International
  • Conference_Location
    Monterey, CA
  • Print_ISBN
    978-1-4673-0368-2
  • Type

    conf

  • DOI
    10.1109/IVESC.2012.6264198
  • Filename
    6264198
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2924893