High-resolution superconducting x-ray spectrometers with an active area of 282 um x 282 um
Conference
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OSTI ID:647023
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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 647023
- Report Number(s):
- UCRL-JC-125225; CONF-960850-; ON: DE98052045; BR: GC0401000; TRN: 98:009235
- Resource Relation:
- Conference: Applied superconductivity conference, Pittsburgh, PA (United States), 25-30 Aug 1996; Other Information: PBD: 11 Sep 1996
- Country of Publication:
- United States
- Language:
- English
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