Josephson Effects in Frequency-Domain Multiplexed TES Microcalorimeters and Bolometers

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https://link.springer.com/article/10.1007/s10909-018-2006-0

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https://doi.org/10.1007/s10909-018-2006-0
 http://hdl.handle.net/11603/24034

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UMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
UMBC Faculty Collection
UMBC Physics Department

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https://orcid.org/0000-0003-4096-4675
 https://orcid.org/0000-0003-0622-5174
 https://orcid.org/0000-0002-9247-3010
 https://orcid.org/0000-0001-8397-9338

Date

2018-07-03

Type of Work

journal articles
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Citation of Original Publication

Gottardi, L., Smith, S.J., Kozorezov, A. et al. Josephson Effects in Frequency-Domain Multiplexed TES Microcalorimeters and Bolometers. J Low Temp Phys 193, 209–216 (2018). https://doi.org/10.1007/s10909-018-2006-0

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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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Abstract

Frequency-division multiplexing is the baseline read-out system for large arrays of superconducting transition-edge sensors (TES’s) under development for the X-ray and infrared instruments like X-IFU (Athena) and SAFARI, respectively. In this multiplexing scheme, the sensors are ac-biased at different frequencies from 1 to 5MHz and operate as amplitude modulators. Weak superconductivity is responsible for the complex TES resistive transition, experimentally explored in great detail so far, both with dc- and ac-biased read-out schemes. In this paper, we will review the current status of our understanding of the physics of the TES’s and their interaction with the ac bias circuit. In particular, we will compare the behaviour of the TES nonlinear impedance, across the superconducting transition, for several detector families, namely: high-normal-resistance TiAu TES bolometers, low-normal-resistance MoAu TES microcalorimeters and high-normal-resistance TiAu TES microcalorimeters.