Induction methods used in low temperature physics

L.J.M. van de Klundert, C. de Rooij, M. Caspari, L.C. van der Marel

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    Abstract

    A study has been made of induction bridges used in low temperature physics. In Part 1 the design of a mutual inductance bridge of the Hartshorn type is discussed. This design is based on a critical analysis of impurity effects of the different parts of the Hartshorn bridge. With this equipment frequencies up to 0.5 MHz can be used. Two methods have been developed to examine the secondary signal. In one of these use has been made of AD conversion techniques. In the other one, the secondary signal, produced by a superconducting sample, which is generally distorted, is analysed by using a Fourier expansion. In Part 2 equipment is described which enables us to measure the phase and amplitude of the harmonics of the output signal of the bridge. For synchronous detection a reference signal of the same frequency of the harmonic of interest is required. This reference signal is generated from the input signal of the bridge by means of a digital frequency multiplier with programmable multiplication factor N. In Part 3 some experimental results, showing the possibilities of the equipment, on some superconductors are presented.
    Original languageEnglish
    Pages (from-to)577-589
    JournalCryogenics
    Volume152
    Issue number10
    DOIs
    Publication statusPublished - 1975

    Fingerprint

    low temperature physics
    induction
    Physics
    Temperature
    Frequency multiplying circuits
    frequency multipliers
    harmonics
    Inductance
    Superconducting materials
    multiplication
    inductance
    Impurities
    impurities
    expansion
    output

    Cite this

    van de Klundert, L. J. M., de Rooij, C., Caspari, M., & van der Marel, L. C. (1975). Induction methods used in low temperature physics. Cryogenics, 152(10), 577-589. https://doi.org/10.1016/0011-2275(75)90067-3
    van de Klundert, L.J.M. ; de Rooij, C. ; Caspari, M. ; van der Marel, L.C. / Induction methods used in low temperature physics. In: Cryogenics. 1975 ; Vol. 152, No. 10. pp. 577-589.
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    van de Klundert, LJM, de Rooij, C, Caspari, M & van der Marel, LC 1975, 'Induction methods used in low temperature physics' Cryogenics, vol. 152, no. 10, pp. 577-589. https://doi.org/10.1016/0011-2275(75)90067-3

    Induction methods used in low temperature physics. / van de Klundert, L.J.M.; de Rooij, C.; Caspari, M.; van der Marel, L.C.

    In: Cryogenics, Vol. 152, No. 10, 1975, p. 577-589.

    Research output: Contribution to journalArticleAcademic

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    AU - Caspari, M.

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    van de Klundert LJM, de Rooij C, Caspari M, van der Marel LC. Induction methods used in low temperature physics. Cryogenics. 1975;152(10):577-589. https://doi.org/10.1016/0011-2275(75)90067-3