New Developments in Superconducting Tunnel Junction X-Ray Spectrometers for Synchrotron Science
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Abstract
We are developing Ta-based superconducting tunnel junction (STJ) X-ray detectors for high-resolution soft X-ray spectroscopy at the synchrotron. For scaling to large detector arrays, we have also built a compact, low-cost, remote-controllable preamplifier with <3 eV electronic noise. Current Ta-STJs attain an energy resolution between 6.5 and 9 eV FWHM for energies up to ∼2 keV, and can be operated at rates up to ∼5,000 counts/s as long as the signals decay with a single exponential time constant.
Keywords
Superconducting tunnel junctions STJ X-ray detectors Synchrotron scienceNotes
Acknowledgements
This paper is based upon work partially supported by the U.S. Department of Energy under Awards Number DE-SC0006214 and DE-SC0002256. Part of this work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
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