• DocumentCode
    2813375
  • Title

    A novel nanocomposite scandia-tungsten coated dispenser cathode

  • Author

    Wang, Ping ; Li, Ji

  • Author_Institution
    Beijing Vacuum Electron. Res. Inst., Beijing, China
  • fYear
    2009
  • fDate
    28-30 April 2009
  • Firstpage
    189
  • Lastpage
    190
  • Abstract
    This paper will present a novel nanocomposite scandia-tungsten coated dispenser cathode, which has the capability to provide more than 150 A/cm2 knee point current density at 1000degCb. The authors pointed out that the generation and maintenance of emissive islets on the cathode surface is the main factor to decide the Sc-type cathodes emission mechanism is incline to dominating thermionic emission or field enhancement thermionic emission.
  • Keywords
    current density; nanocomposites; scandium; thermionic cathodes; thermionic emission; tungsten; ScW; cathode surface; cathodes emission; coated dispenser cathode; current density; emissive islet generation; emissive islet maintenance; nanocomposite scandia-tungsten; thermionic emission; Cathodes; Current density; Knee; Powders; Rough surfaces; Sputtering; Surface roughness; Temperature; Testing; Thermionic emission; coated dispenser cathode; high current density; nanocomposite scandia-tungsten;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
  • Conference_Location
    Rome
  • Print_ISBN
    978-1-4244-3500-5
  • Electronic_ISBN
    978-1-4244-3501-2
  • Type

    conf

  • DOI
    10.1109/IVELEC.2009.5193516
  • Filename
    5193516
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2813375