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

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
CountryUnited 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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  • Cite this

    Jung, S., Han, W. K., Kim, D., Chang, W. S., Seol, S. K., Bae, W. M., Byun, G. S., Park, K. C., & Ju, B. K. (2011). A field-emission X-ray source using an anisotropically focused electron beam. In Technical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011 (pp. 185-187). (Technical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011; Vol. 1).