Reduced-Scale Transition-Edge Sensor Detectors for Solar and X-Ray Astrophysics
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Date
2017-01-09
Type of Work
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Citation of Original Publication
A. M. Datesman et al., "Reduced-Scale Transition-Edge Sensor Detectors for Solar and X-Ray Astrophysics," in IEEE Transactions on Applied Superconductivity, vol. 27, no. 4, pp. 1-5, June 2017, Art no. 2100505, doi: 10.1109/TASC.2017.2649839.
Rights
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Public Domain Mark 1.0
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Abstract
We have developed large-format, close-packed X-ray
microcalorimeter arrays fabricated on solid substrates, designed
to achieve high energy resolution with count rates up to a few
hundred counts per second per pixel for X-ray photon energies up
to 8 keV. Our most recent arrays feature 31-micron absorbers on
a 35-micron pitch, reducing the size of pixels by about a factor of
two. This change will enable an instrument with significantly higher
angular resolution. In order to wire out large format arrays with
an increased density of smaller pixels, we have reduced the lateral
size of both the microstrip wiring and the Mo/Au transition-edge
sensors (TES). We report on the key physical properties of these
small TESs and the fine Nb leads attached, including the critical
currents and weak-link properties associated with the longitudinal
proximity effect.