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Design, fabrication and characterization of a 64 pixel metallic magnetic calorimeter array with integrated, on-chip microwave SQUID multiplexer

We report on the design, fabrication and characterization of a 64 pixel metallic magnetic calorimeter array that is read out by an integrated, on-chip microwave SQUID multiplexer. Based on the results of our comprehensive device characterization we refined the state-of-the-art multiplexer model whic...

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Hauptverfasser: Kempf, Sebastian (VerfasserIn) , Wegner, Mathias (VerfasserIn) , Fleischmann, Andreas (VerfasserIn) , Gastaldo, Loredana (VerfasserIn) , Herrmann, Felix (VerfasserIn) , Richter, Daniel Philipp (VerfasserIn) , Enss, Christian (VerfasserIn) , Deeg, Lukas (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 15 May 2017
In: Superconductor science and technology
Year: 2017, Jahrgang: 30, Heft: 6, Pages: ?
ISSN:1361-6668
DOI:10.1088/1361-6668/aa6d17
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1088/1361-6668/aa6d17
Verlag, Volltext: http://stacks.iop.org/0953-2048/30/i=6/a=065002
Volltext
Verfasserangaben:S. Kempf, M. Wegner, L. Deeg, A. Fleischmann, L. Gastaldo, F. Herrmann, D. Richter and C. Enss
Beschreibung
Zusammenfassung:We report on the design, fabrication and characterization of a 64 pixel metallic magnetic calorimeter array that is read out by an integrated, on-chip microwave SQUID multiplexer. Based on the results of our comprehensive device characterization we refined the state-of-the-art multiplexer model which assumes each associated non-hysteretic rf-SQUID to purely behave as a flux-dependent inductor. In particular, we include the capacitance and the subgap resistance of the Josephson junction as well as screening effects and parasitic mutual couplings between different coils that show up only when a superconducting flux transformer is attached to the SQUID input. Thanks to these modifications, we are able to explain the occurrence of a magnetic flux dependence of the internal quality factor of the microwave resonators as well as to accurately calculate the characteristic multiplexer parameters. When combining the refined multiplexer model with the thermodynamical description of a metallic magnetic calorimeter, we find a reasonable agreement between our measurements and predictions.
Beschreibung:Gesehen am 17.07.2020
Beschreibung:Online Resource
ISSN:1361-6668
DOI:10.1088/1361-6668/aa6d17

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