Two-stage locally linearized SQUID readout for frequency domain multiplexed calorimeter arrays

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    We have constructed a two-stage SQUID amplifier intended for multiplexed cryogenic detector arrays. The upper SQUID is a locally linearized 6 × 80 array showing 0.13 μΦ0 Hz − 1/2 flux noise at 4.2 K. The lower linearized 4 × 3 SQUID array has decoupled input and feedback coils and shows 0.28  μΦ0 Hz − 1/2 flux noise at 4.2 K. Design principles and measured performance are reviewed.
    Original languageEnglish
    Number of pages7
    JournalSuperconductor Science and Technology
    Issue number4
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed


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