Fiske modes in superconducting tunnel junction detectors

S. Friedrich, M. F. Cunningham, Matthias Frank, S. E. Labov, A. T. Barfknecht, S. P. Cramer

Research output: Contribution to journalConference article

10 Scopus citations

Abstract

We are developing superconducting tunnel junction (STJ) X-ray spectrometers with high-energy resolution (<10 eV for keV X-rays) and high count rate capabilities (>10 000 counts/s). We have examined the influence of Fiske mode resonances on energy resolution, maximum count rate and area of Nb-Al-AlOx-Al-Nb STJ detectors. At low count rate, these detectors have an energy resolution of 2.3 eV FWHM at 70 eV. At 20 000 counts/s, the resolution is 8.2 eV FWHM at 277 eV. We observe the optimum detector performance when the influence of Fiske modes is minimized.

Original languageEnglish (US)
Pages (from-to)151-155
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume444
Issue number1
DOIs
StatePublished - Apr 7 2000
Externally publishedYes
Event8th International Workshop on Low Temperature Detectors (LTD-8) - Dalfsen, Neth
Duration: Aug 15 1999Aug 20 1999

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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