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Proceedings Paper

X-ray response of Nb-based superconducting tunnel junctions with Al trapping layers
Author(s): Peter Verhoeve; Nicola Rando; Anthony J. Peacock; Abel Poelaert; Axel van Dordrecht; David H. Lumb; D. J. Goldie; R. Venn
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Paper Abstract

Measurements of the x ray response of niobium-based superconducting tunnel junctions with Al trapping layers are presented. Signal amplitudes equivalent to as many as 2.3 multiplied by 108 tunneled electrons for a 5.9 keV photon are observed, corresponding to an amplification factor of approximately 100 per initially created quasiparticle in niobium. The detectors, however, exhibit a significant non-linearity in their energy response. The energy resolution is approximately 140 eV FWHM at 5.9 keV.

Paper Details

Date Published: 1 September 1995
PDF: 8 pages
Proc. SPIE 2518, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI, (1 September 1995); doi: 10.1117/12.218384
Show Author Affiliations
Peter Verhoeve, European Space Agency/ESTEC (Netherlands)
Nicola Rando, European Space Agency/ESTEC (Netherlands)
Anthony J. Peacock, European Space Agency/ESTEC (Netherlands)
Abel Poelaert, European Space Agency/ESTEC (Netherlands)
Axel van Dordrecht, European Space Agency/ESTEC (Netherlands)
David H. Lumb, European Space Agency/ESTEC (Netherlands)
D. J. Goldie, Oxford Instruments (United Kingdom)
R. Venn, Cambridge Microfab Ltd. (United Kingdom)


Published in SPIE Proceedings Vol. 2518:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI
Oswald H. W. Siegmund; John V. Vallerga, Editor(s)

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