Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV

M. Ohkubo, M. Ukibe, T. Zama, T. Ikeuchi, M. Katagiri, Shingo Ichimura

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

It has been demonstrated by Low-Temperature Scanning Synchrotron Microscope that the spatial profiles of Nb/Al/AlOx/Al/Nb detectors are abnormally large in an energy range between 2 and 10keV, and thus the detectors produce no clear total absorption peaks. Below 2keV, on the other hand, full illumination experiments have afforded the evidence that the spatial uniformity is significantly improved, for example, an 100μm square junction has an intrinsic energy resolution of 5.4eV at 200eV. These results reconfirm that carefully designed junction detectors with a reasonable size are ideal for energy-dispersive spectroscopy in a soft X-ray range.

Original languageEnglish
Pages (from-to)231-233
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume520
Issue number1-3
DOIs
Publication statusPublished - 2004 Mar 11
Externally publishedYes

Fingerprint

Tunnel junctions
tunnel junctions
nonuniformity
Photons
Detectors
conduction
detectors
photons
Synchrotrons
energy
Energy dispersive spectroscopy
synchrotrons
Microscopes
Lighting
illumination
microscopes
Scanning
X rays
scanning
profiles

Keywords

  • Spatial profile
  • Superconducting tunnel junction
  • Synchrotron radiation
  • X-ray spectroscopy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

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abstract = "It has been demonstrated by Low-Temperature Scanning Synchrotron Microscope that the spatial profiles of Nb/Al/AlOx/Al/Nb detectors are abnormally large in an energy range between 2 and 10keV, and thus the detectors produce no clear total absorption peaks. Below 2keV, on the other hand, full illumination experiments have afforded the evidence that the spatial uniformity is significantly improved, for example, an 100μm square junction has an intrinsic energy resolution of 5.4eV at 200eV. These results reconfirm that carefully designed junction detectors with a reasonable size are ideal for energy-dispersive spectroscopy in a soft X-ray range.",
keywords = "Spatial profile, Superconducting tunnel junction, Synchrotron radiation, X-ray spectroscopy",
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T1 - Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV

AU - Ohkubo, M.

AU - Ukibe, M.

AU - Zama, T.

AU - Ikeuchi, T.

AU - Katagiri, M.

AU - Ichimura, Shingo

PY - 2004/3/11

Y1 - 2004/3/11

N2 - It has been demonstrated by Low-Temperature Scanning Synchrotron Microscope that the spatial profiles of Nb/Al/AlOx/Al/Nb detectors are abnormally large in an energy range between 2 and 10keV, and thus the detectors produce no clear total absorption peaks. Below 2keV, on the other hand, full illumination experiments have afforded the evidence that the spatial uniformity is significantly improved, for example, an 100μm square junction has an intrinsic energy resolution of 5.4eV at 200eV. These results reconfirm that carefully designed junction detectors with a reasonable size are ideal for energy-dispersive spectroscopy in a soft X-ray range.

AB - It has been demonstrated by Low-Temperature Scanning Synchrotron Microscope that the spatial profiles of Nb/Al/AlOx/Al/Nb detectors are abnormally large in an energy range between 2 and 10keV, and thus the detectors produce no clear total absorption peaks. Below 2keV, on the other hand, full illumination experiments have afforded the evidence that the spatial uniformity is significantly improved, for example, an 100μm square junction has an intrinsic energy resolution of 5.4eV at 200eV. These results reconfirm that carefully designed junction detectors with a reasonable size are ideal for energy-dispersive spectroscopy in a soft X-ray range.

KW - Spatial profile

KW - Superconducting tunnel junction

KW - Synchrotron radiation

KW - X-ray spectroscopy

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