Monochromatic field electron emission from a Nb superconductor

Chuhei Oshima

doi:10.1016/S0304-3991(99)00014-5

Monochromatic field electron emission from a Nb superconductor

Chuhei Oshima^*

^*Corresponding author for this work

Waseda University

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	27-32
Number of pages	6
Journal	Ultramicroscopy
Volume	78
Issue number	1-4
DOIs	https://doi.org/10.1016/S0304-3991(99)00014-5
Publication status	Published - 1999 Jun

Keywords

Field emission
Monochromatic beam
Superconductor

ASJC Scopus subject areas

Materials Science(all)
Instrumentation

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10.1016/S0304-3991(99)00014-5

Cite this

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title = "Monochromatic field electron emission from a Nb superconductor",

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.",

keywords = "Field emission, Monochromatic beam, Superconductor",

author = "Chuhei Oshima",

year = "1999",

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AU - Oshima, Chuhei

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N2 - 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.

AB - 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.

KW - Field emission

KW - Monochromatic beam

KW - Superconductor

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JO - Ultramicroscopy

JF - Ultramicroscopy

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ER -

Monochromatic field electron emission from a Nb superconductor

Abstract

Keywords

ASJC Scopus subject areas

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