Properties of large-sized nb-based superconducting tunnel junctions for x-ray detection

Kenji Ishibashi, Ken Ichi Mori, Toshimitsu Nagae, Chiken Kinoshita, Susumu Takada, Hiroshi Nakagawa, Hiroshi Akoh, Masahiro Aoyagi, Satoshi Kohjiro, Kazuhiko Takeno, Yuzuru Matsumoto, Akira Katase

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2 Citations (Scopus)

Abstract

Niobium-based superconducting tunnel junctions are expected to be applicable to high-resolution X-ray measurements. Large-sized tunnel junctions with a Nb/Al/A10x/Nb structure have been fabricated in order to study their performance in X-ray detection. The niobium layer which was sensitive to X-rays had a large size of 100/xm square x 1.2/xm thick. The junction detected 5.9 keV X-rays with an energy resolution of 1 keV. On the basis of the experimental data, the junction parameters were studied to produce a better energy resolution than that of silicon semiconductor detectors. The microstructure of the aluminum layer was observed by means of a transmission electron microscope.

Original languageEnglish
Pages (from-to)1969-1974
Number of pages6
JournalJapanese Journal of Applied Physics
Volume30
Issue number9
DOIs
Publication statusPublished - Sep 1991

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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    Ishibashi, K., Mori, K. I., Nagae, T., Kinoshita, C., Takada, S., Nakagawa, H., Akoh, H., Aoyagi, M., Kohjiro, S., Takeno, K., Matsumoto, Y., & Katase, A. (1991). Properties of large-sized nb-based superconducting tunnel junctions for x-ray detection. Japanese Journal of Applied Physics, 30(9), 1969-1974. https://doi.org/10.1143/JJAP.30.1969