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

Nikolay Beev (Corresponding Author), Mikko Kiviranta, J van der Kuur, M Bruijn, O Brandel, S Linzen, L Fritzsch, J Ahoranta, J Penttilä, L Roschier

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)


    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
    Original languageEnglish
    Number of pages5
    JournalJournal of Physics: Conference Series
    Issue numberPart 4
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed
    Event11th European Conference on Applied Superconductivity, EUCAS 2013 - Genoa, Italy
    Duration: 15 Sep 201319 Sep 2013
    Conference number: 11


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