Journal
JOURNAL OF LOW TEMPERATURE PHYSICS
Volume 176, Issue 3-4, Pages 356-362Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10909-013-1031-2
Keywords
Transition-edge sensor; Microcalorimeter; Weak-link; Proximity effect
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Funding
- NASA
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Mo/Au transition-edge sensors exhibit weak-link behavior in the measured temperature, and field, dependence of the critical current . This is a consequence of the longitudinal proximitization between the Nb electrical bias contacts and the bilayer. Understanding how weak-link superconductivity impacts the resistive transition and the detector energy resolution is of great interest. In this contribution we present studies of for three devices that have different geometries of metallic depositions on top of the sensor used for noise mitigation and X-ray absorption. Results show that these features change the measured compared to the previously seen measurements on devices without additional deposition layers. Measurements of the small signal transition parameters and also reveal differences between designs that impact the measured response to X-rays and energy resolution.
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