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A field-emission X-ray source using an anisotropically focused electron beam

  • Sunshin Jung*
  • , Woo Kyung Han
  • , Daeho Kim
  • , Won Suk Chang
  • , Seung Kwon Seol
  • , Woo Mi Bae
  • , Gui Sob Byun
  • , Kyu Chang Park
  • , Byeong Kwon Ju
  • *Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    A field-emission x-ray source for dental imaging with an anode voltage of 70 kV and an anode current of more than 1 mA was designed and assembled using an anisotropically focused electron beam. With up to 3 kV (5 V/um) applied to a grid, the emitted electrons from a carbon nanotube based cathode were shaped into an elliptical beam by an anisotropic electron lens. The electron beam was accelerated by an 13.5-degree angled stationary anode target and focused to a small spot size, which results in an circular-shaped effective x-ray focal spot with a diameter of less than 400 um.

    Original languageEnglish
    Title of host publicationTechnical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
    Pages185-187
    Number of pages3
    Publication statusPublished - 2011
    EventNanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011 - Boston, MA, United States
    Duration: 2011 Jun 132011 Jun 16

    Publication series

    NameTechnical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
    Volume1

    Other

    OtherNanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
    Country/TerritoryUnited States
    CityBoston, MA
    Period11/6/1311/6/16

    Keywords

    • Electron beam
    • Field emission
    • X-ray source

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Surfaces, Coatings and Films
    • Surfaces and Interfaces

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