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; S. Ichimura

doi:10.1016/j.nima.2003.11.331

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, S. Ichimura

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

3 Citations (Scopus)

Abstract

It has been demonstrated by Low-Temperature Scanning Synchrotron Microscope that the spatial profiles of Nb/Al/AlO_x/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 language	English
Pages (from-to)	231-233
Number of pages	3
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	520
Issue number	1-3
DOIs	https://doi.org/10.1016/j.nima.2003.11.331
Publication status	Published - 2004 Mar 11
Externally published	Yes

Keywords

Spatial profile
Superconducting tunnel junction
Synchrotron radiation
X-ray spectroscopy

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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Ohkubo, M., Ukibe, M., Zama, T., Ikeuchi, T., Katagiri, M., & Ichimura, S. (2004). Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 520(1-3), 231-233. https://doi.org/10.1016/j.nima.2003.11.331

Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV. / Ohkubo, M.; Ukibe, M.; Zama, T.; Ikeuchi, T.; Katagiri, M.; Ichimura, S.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 520, No. 1-3, 11.03.2004, p. 231-233.

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

Ohkubo, M, Ukibe, M, Zama, T, Ikeuchi, T, Katagiri, M & Ichimura, S 2004, 'Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 520, no. 1-3, pp. 231-233. https://doi.org/10.1016/j.nima.2003.11.331

Ohkubo M, Ukibe M, Zama T, Ikeuchi T, Katagiri M, Ichimura S. Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2004 Mar 11;520(1-3):231-233. https://doi.org/10.1016/j.nima.2003.11.331

Ohkubo, M. ; Ukibe, M. ; Zama, T. ; Ikeuchi, T. ; Katagiri, M. ; Ichimura, S. / Photon energy dependence of spatial non-uniformity in super-conducting tunnel junction detectors between 200 ev and 10 keV. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2004 ; Vol. 520, No. 1-3. pp. 231-233.

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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.",

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