Monochromatic field electron emission from a Nb superconductor

Chuhei Oshima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

To observe a monochromatic electron beam with energy width much narrower than that of a conventional electron beam, we have constructed an apparatus consisting of a low-temperature field-emission electron gun cooled to 4.2 K and a high-resolution electron spectrometer operating at high vacuum. With this system, we have observed spectra of the field electron emission from a niobium superconducting emitter. After tip cleaning by repeated treatments of field evaporation in vacuum less than 10-10 Pa, we have detected a sharp peak at the Fermi level in the spectra with an energy width of ~ 20 meV at 10 nA.

Original languageEnglish
Pages (from-to)27-32
Number of pages6
JournalUltramicroscopy
Volume78
Issue number1-4
DOIs
Publication statusPublished - 1999 Jun

Fingerprint

Electron emission
electron emission
Superconducting materials
field emission
Electron beams
Niobium
Vacuum
electron beams
Electron guns
electron guns
high vacuum
Fermi level
niobium
Field emission
cleaning
Spectrometers
Cleaning
Evaporation
emitters
Temperature distribution

Keywords

  • Field emission
  • Monochromatic beam
  • Superconductor

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation

Cite this

Monochromatic field electron emission from a Nb superconductor. / Oshima, Chuhei.

In: Ultramicroscopy, Vol. 78, No. 1-4, 06.1999, p. 27-32.

Research output: Contribution to journalArticle

Oshima, Chuhei. / Monochromatic field electron emission from a Nb superconductor. In: Ultramicroscopy. 1999 ; Vol. 78, No. 1-4. pp. 27-32.
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