Characterization of SQUID-based null detector for a quantum metrology triangle experiment

Juho Luomahaara, A. Kemppinen, Panu Helistö, Juha Hassel

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)

    Abstract

    We present characterization of a null detector designed for an experiment aimed to close the quantum metrological triangle (QMT). The device is a SQUID amplifier equipped with a large winding-ratio planar input transformer improving the current resolution. We demonstrate equivalent input current noise down to 14 fA/Hz1/2 . Furthermore, operation in a realistic environment of a dry dilution refrigerator hosting the QMT experiment is studied. We discuss particular challenges set by such system as the cryogenics introduces relatively large magnetic interference. We present data from measurements simulating the final QMT experiment and introduce the requirements for the averaging and bias reversal.
    Original languageEnglish
    Article number1601705
    Number of pages5
    JournalIEEE Transactions on Applied Superconductivity
    Volume23
    Issue number3
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed
    EventApplied Superconductivity Conference, ASC 2012 - Portland, United States
    Duration: 7 Oct 201212 Oct 2012

    Fingerprint

    SQUIDs
    triangles
    metrology
    Detectors
    detectors
    Experiments
    Refrigerators
    refrigerators
    transformers
    Cryogenics
    Dilution
    cryogenics
    dilution
    amplifiers
    interference
    requirements

    Keywords

    • quantum metrological triangle
    • SQUID ammeter

    Cite this

    @article{d54e8103e51f4b1592be1cb2398f603c,
    title = "Characterization of SQUID-based null detector for a quantum metrology triangle experiment",
    abstract = "We present characterization of a null detector designed for an experiment aimed to close the quantum metrological triangle (QMT). The device is a SQUID amplifier equipped with a large winding-ratio planar input transformer improving the current resolution. We demonstrate equivalent input current noise down to 14 fA/Hz1/2 . Furthermore, operation in a realistic environment of a dry dilution refrigerator hosting the QMT experiment is studied. We discuss particular challenges set by such system as the cryogenics introduces relatively large magnetic interference. We present data from measurements simulating the final QMT experiment and introduce the requirements for the averaging and bias reversal.",
    keywords = "quantum metrological triangle, SQUID ammeter",
    author = "Juho Luomahaara and A. Kemppinen and Panu Helist{\"o} and Juha Hassel",
    note = "Project code: 72785 Project code: 4160",
    year = "2013",
    doi = "10.1109/TASC.2012.2237212",
    language = "English",
    volume = "23",
    journal = "IEEE Transactions on Applied Superconductivity",
    issn = "1051-8223",
    publisher = "IEEE Institute of Electrical and Electronic Engineers",
    number = "3",

    }

    Characterization of SQUID-based null detector for a quantum metrology triangle experiment. / Luomahaara, Juho; Kemppinen, A.; Helistö, Panu; Hassel, Juha.

    In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 1601705, 2013.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Characterization of SQUID-based null detector for a quantum metrology triangle experiment

    AU - Luomahaara, Juho

    AU - Kemppinen, A.

    AU - Helistö, Panu

    AU - Hassel, Juha

    N1 - Project code: 72785 Project code: 4160

    PY - 2013

    Y1 - 2013

    N2 - We present characterization of a null detector designed for an experiment aimed to close the quantum metrological triangle (QMT). The device is a SQUID amplifier equipped with a large winding-ratio planar input transformer improving the current resolution. We demonstrate equivalent input current noise down to 14 fA/Hz1/2 . Furthermore, operation in a realistic environment of a dry dilution refrigerator hosting the QMT experiment is studied. We discuss particular challenges set by such system as the cryogenics introduces relatively large magnetic interference. We present data from measurements simulating the final QMT experiment and introduce the requirements for the averaging and bias reversal.

    AB - We present characterization of a null detector designed for an experiment aimed to close the quantum metrological triangle (QMT). The device is a SQUID amplifier equipped with a large winding-ratio planar input transformer improving the current resolution. We demonstrate equivalent input current noise down to 14 fA/Hz1/2 . Furthermore, operation in a realistic environment of a dry dilution refrigerator hosting the QMT experiment is studied. We discuss particular challenges set by such system as the cryogenics introduces relatively large magnetic interference. We present data from measurements simulating the final QMT experiment and introduce the requirements for the averaging and bias reversal.

    KW - quantum metrological triangle

    KW - SQUID ammeter

    U2 - 10.1109/TASC.2012.2237212

    DO - 10.1109/TASC.2012.2237212

    M3 - Article

    VL - 23

    JO - IEEE Transactions on Applied Superconductivity

    JF - IEEE Transactions on Applied Superconductivity

    SN - 1051-8223

    IS - 3

    M1 - 1601705

    ER -