High-resolution superconducting x-ray spectrometers with an active area of 282 um x 282 um

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Superconducting tunnel junctions coupled to superconducting absorbers may be used as high-resolution, high-efficiency X-ray spectrometers. We have tested devices with niobium X-ray absorbing layers coupled to aluminum layers that serve as quasiparticle traps. In this work we measured the current pulses from a large area tunnel junction using an amplifier based on an array of 100 SQUIDs. Using this amplifier and a 282 micron X 282 micron junction, we have measured an energy resolution of 19 eV FWHM for 1.5 keV X rays and 21 eV for 2.6 keV X rays. The area of this junction is eight times the ... continued below

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7 p.

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Mears, C.A.; Labov, S.E.; Frank, M.; Netel, H.; Hiller, L.J.; Lindeman, M.A. et al. September 11, 1996.

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Superconducting tunnel junctions coupled to superconducting absorbers may be used as high-resolution, high-efficiency X-ray spectrometers. We have tested devices with niobium X-ray absorbing layers coupled to aluminum layers that serve as quasiparticle traps. In this work we measured the current pulses from a large area tunnel junction using an amplifier based on an array of 100 SQUIDs. Using this amplifier and a 282 micron X 282 micron junction, we have measured an energy resolution of 19 eV FWHM for 1.5 keV X rays and 21 eV for 2.6 keV X rays. The area of this junction is eight times the area of any junction previously measured to have such high energy resolution.

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7 p.

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INIS; OSTI as DE98052045

Other: FDE: PDF; PL:

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  • Applied superconductivity conference, Pittsburgh, PA (United States), 25-30 Aug 1996

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  • Other: DE98052045
  • Report No.: UCRL-JC--125225
  • Report No.: CONF-960850--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 647023
  • Archival Resource Key: ark:/67531/metadc709480

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  • September 11, 1996

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 6, 2017, 6:05 p.m.

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Mears, C.A.; Labov, S.E.; Frank, M.; Netel, H.; Hiller, L.J.; Lindeman, M.A. et al. High-resolution superconducting x-ray spectrometers with an active area of 282 um x 282 um, article, September 11, 1996; California. (digital.library.unt.edu/ark:/67531/metadc709480/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.