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Title: Cryogenic time-domain multiplexer based on SQUID arrays and superconducting/normal conducting switches
Authors: Beev, N.Kiviranta, M.Van Der Kuur, J.Bruijn, M.Brandel, O.Linzen, S.Fritzsch, L.Ahoranta, J.Penttilä, J.Roschier, L.
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Issue Date: 2014
Published in: Journal of Physics: Conference Series Vol. 507 (2014)
Publisher: Bristol : Institute of Physics Publishing
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.
Keywords: Molluscs; Multiplexing; Multiplexing equipment; Refrigerators; Shellfish; Dilution refrigerator; Fabrication process; Flux locked loops; Interferometer arrays; Measurement data; Readout channels; Superconducting state; X-ray calorimeters; Time switches
DDC: 530
License: CC BY 3.0 Unported
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