Cryogenic time-domain multiplexer based on SQUID arrays and superconducting/normal conducting switches

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http://hdl.handle.net/10138/161987

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Beev , N , Kiviranta , M , van der Kuur , J , Bruijn , M , Brandel , O , Linzen , S , Fritzsch , L , Ahoranta , J , Penttila , J & Roschier , L 2014 , ' Cryogenic time-domain multiplexer based on SQUID arrays and superconducting/normal conducting switches ' , Journal of Physics : Conference Series , vol. 507 , no. Part 4 , 042003 . https://doi.org/10.1088/1742-6596/507/4/042003

Title: Cryogenic time-domain multiplexer based on SQUID arrays and superconducting/normal conducting switches
Author: Beev, N.; Kiviranta, M.; van der Kuur, J.; Bruijn, M.; Brandel, O.; Linzen, S.; Fritzsch, L.; Ahoranta, J.; Penttila, J.; Roschier, L.
Contributor: University of Helsinki, Department of Physics
Date: 2014
Language: eng
Number of pages: 4
Belongs to series: Journal of Physics : Conference Series
ISSN: 1742-6588
URI: http://hdl.handle.net/10138/161987
Abstract: We have demonstrated the operation of a 12-channel Beyer-style SQUID-based time domain multiplexer. It was manufactured using a fabrication process that is cross-compatible between VTT and IPHT-Jena. The multiplexer consists of twelve 12-SQUID series arrays, each shunted by a Zappe-style interferometer array acting as a flux-controlled superconducting/normal conducting switch. By keeping all switches but one in the superconducting state, it is possible to select one active readout channel at a time. A flux feedback coil common to all SQUID arrays allows realization of a flux-locked loop. We present characteristics of the multiplexer and measurement data from experiments with a 25-pixel X-ray calorimeter array operated at T <100 mK in a dilution refrigerator.
Subject: 114 Physical sciences
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