X-ray response of Nb-based superconducting tunnel junctions with Al trapping layers

Peter Verhoeve; Nicola Rando; Anthony J. Peacock; Abel Poelaert; Axel van Dordrecht; David H. Lumb; D. J. Goldie; R. Venn

doi:10.1117/12.218384

1 September 1995 X-ray response of Nb-based superconducting tunnel junctions with Al trapping layers

Peter Verhoeve, Nicola Rando, Anthony J. Peacock, Abel Poelaert, Axel van Dordrecht, David H. Lumb, D. J. Goldie, R. Venn

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Proceedings Volume 2518, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI; (1995) https://doi.org/10.1117/12.218384
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

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Peter Verhoeve, Nicola Rando, Anthony J. Peacock, Abel Poelaert, Axel van Dordrecht, David H. Lumb, D. J. Goldie, and R. Venn "X-ray response of Nb-based superconducting tunnel junctions with Al trapping layers", Proc. SPIE 2518, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI, (1 September 1995); https://doi.org/10.1117/12.218384

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