Crosstalk in microwave SQUID multiplexers

Mates, John B.; Becker, D. T.; Bennett, D. A.; Dober, B. J.; Gard, J. D.; Hilton, G. C.; Swetz, D. S.; Vale, L. R.; Ullom, J. N.

doi:10.1063/1.5116573

Title: Crosstalk in microwave SQUID multiplexers

Journal Article · Fri Nov 15 00:00:00 EST 2019 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.5116573· OSTI ID:1848126

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Univ. of Colorado, Boulder, CO (United States)
National Inst. of Standards and Technology (NIST), Boulder, CO (United States)
Univ. of Colorado, Boulder, CO (United States); National Inst. of Standards and Technology (NIST), Boulder, CO (United States)

Low-temperature detector technologies provide extraordinary sensitivity for applications ranging from precision measurements of the cosmic microwave background to high-resolution, high-rate x-ray, and γ-ray spectroscopy. To utilize this sensitivity, new instruments are being built, and new instruments are imagined, with ever greater pixel counts, but the scale of these instruments is limited by the capability of the readout electronics. Microwave SQUID multiplexing addresses the needs of these future instruments, exploiting gigahertz of bandwidths of coaxial cables and broadband components to combine hundreds to thousands of signals on a single readout line. A key feature of any multiplexer is the level of crosstalk between input channels. This crosstalk can degrade the sensitivity of the instrument, introduce systematic error, or simply confound data analysis. In this letter, we explain the primary mechanisms of crosstalk in a microwave SQUID multiplexer, calculate and measure their magnitude, and consider their effect and methods of mitigation.

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Research Organization:: Univ. of Colorado, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: NE0008555

OSTI ID:: 1848126

Journal Information:: Applied Physics Letters, Vol. 115, Issue 20; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

An impedance-modulated code-division microwave SQUID multiplexer Yu, C.; Ames, A.; Chaudhuri, S. Engineering Research Express, Vol. 2, Issue 1 https://doi.org/10.1088/2631-8695/ab68a4	journal	January 2020
An Impedance-Modulated Code-Division Microwave SQUID Multiplexer Yu, C.; Ames, A.; Chaudhuri, S. arXiv https://doi.org/10.48550/arxiv.2001.02763	preprint	January 2020

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