A femtoamperemeter based on a superconducting quantum interferometer and a bulk transformer

M.A. Tarasov, A.S. Kalabukhov, S.A. Kovtonyuk, I.L. Lapitskaya, S.A. Gudoshnikov, Mikko Kiviranta, O.V. Snigirev, L.S. Kuzmin, Heikki Seppä

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

A femtoamperemeter based on a superconducting quantum interference device (SQUID) with a planar on-chip gradiometric transformer and an additional volume cryogenic transformer on a toroidal ferromagnetic core is developed, fabricated, and experimentally studied. The conditions for the optimum matching of the SQUID to the signal source are analyzed. It is demonstrated that the conditions for the optimum matching and high coupling coefficient are satisfied in the transformer with a ferromagnetic core. The excess noise introduced by the core is studied experimentally. It is shown that double shielding using superconducting and ferromagnetic shields makes it possible to lower the cutoff frequency of the excess noise to less than 1 kHz.
Original languageEnglish
Pages (from-to)1404-1409
Number of pages6
JournalJournal of Communications Technology and Electronics
Volume48
Issue number12
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed

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SQUIDs
transformers
Interferometers
Cutoff frequency
Shielding
Cryogenics
interference
coupling coefficients
cryogenics
shielding
cut-off
chips

Cite this

Tarasov, M. A., Kalabukhov, A. S., Kovtonyuk, S. A., Lapitskaya, I. L., Gudoshnikov, S. A., Kiviranta, M., ... Seppä, H. (2003). A femtoamperemeter based on a superconducting quantum interferometer and a bulk transformer. Journal of Communications Technology and Electronics, 48(12), 1404-1409.
Tarasov, M.A. ; Kalabukhov, A.S. ; Kovtonyuk, S.A. ; Lapitskaya, I.L. ; Gudoshnikov, S.A. ; Kiviranta, Mikko ; Snigirev, O.V. ; Kuzmin, L.S. ; Seppä, Heikki. / A femtoamperemeter based on a superconducting quantum interferometer and a bulk transformer. In: Journal of Communications Technology and Electronics. 2003 ; Vol. 48, No. 12. pp. 1404-1409.
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abstract = "A femtoamperemeter based on a superconducting quantum interference device (SQUID) with a planar on-chip gradiometric transformer and an additional volume cryogenic transformer on a toroidal ferromagnetic core is developed, fabricated, and experimentally studied. The conditions for the optimum matching of the SQUID to the signal source are analyzed. It is demonstrated that the conditions for the optimum matching and high coupling coefficient are satisfied in the transformer with a ferromagnetic core. The excess noise introduced by the core is studied experimentally. It is shown that double shielding using superconducting and ferromagnetic shields makes it possible to lower the cutoff frequency of the excess noise to less than 1 kHz.",
author = "M.A. Tarasov and A.S. Kalabukhov and S.A. Kovtonyuk and I.L. Lapitskaya and S.A. Gudoshnikov and Mikko Kiviranta and O.V. Snigirev and L.S. Kuzmin and Heikki Sepp{\"a}",
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Tarasov, MA, Kalabukhov, AS, Kovtonyuk, SA, Lapitskaya, IL, Gudoshnikov, SA, Kiviranta, M, Snigirev, OV, Kuzmin, LS & Seppä, H 2003, 'A femtoamperemeter based on a superconducting quantum interferometer and a bulk transformer', Journal of Communications Technology and Electronics, vol. 48, no. 12, pp. 1404-1409.

A femtoamperemeter based on a superconducting quantum interferometer and a bulk transformer. / Tarasov, M.A.; Kalabukhov, A.S.; Kovtonyuk, S.A.; Lapitskaya, I.L.; Gudoshnikov, S.A.; Kiviranta, Mikko; Snigirev, O.V.; Kuzmin, L.S.; Seppä, Heikki.

In: Journal of Communications Technology and Electronics, Vol. 48, No. 12, 2003, p. 1404-1409.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - A femtoamperemeter based on a superconducting quantum interferometer and a bulk transformer

AU - Tarasov, M.A.

AU - Kalabukhov, A.S.

AU - Kovtonyuk, S.A.

AU - Lapitskaya, I.L.

AU - Gudoshnikov, S.A.

AU - Kiviranta, Mikko

AU - Snigirev, O.V.

AU - Kuzmin, L.S.

AU - Seppä, Heikki

PY - 2003

Y1 - 2003

N2 - A femtoamperemeter based on a superconducting quantum interference device (SQUID) with a planar on-chip gradiometric transformer and an additional volume cryogenic transformer on a toroidal ferromagnetic core is developed, fabricated, and experimentally studied. The conditions for the optimum matching of the SQUID to the signal source are analyzed. It is demonstrated that the conditions for the optimum matching and high coupling coefficient are satisfied in the transformer with a ferromagnetic core. The excess noise introduced by the core is studied experimentally. It is shown that double shielding using superconducting and ferromagnetic shields makes it possible to lower the cutoff frequency of the excess noise to less than 1 kHz.

AB - A femtoamperemeter based on a superconducting quantum interference device (SQUID) with a planar on-chip gradiometric transformer and an additional volume cryogenic transformer on a toroidal ferromagnetic core is developed, fabricated, and experimentally studied. The conditions for the optimum matching of the SQUID to the signal source are analyzed. It is demonstrated that the conditions for the optimum matching and high coupling coefficient are satisfied in the transformer with a ferromagnetic core. The excess noise introduced by the core is studied experimentally. It is shown that double shielding using superconducting and ferromagnetic shields makes it possible to lower the cutoff frequency of the excess noise to less than 1 kHz.

M3 - Article

VL - 48

SP - 1404

EP - 1409

JO - Journal of Communications Technology and Electronics

JF - Journal of Communications Technology and Electronics

SN - 1064-2269

IS - 12

ER -

Tarasov MA, Kalabukhov AS, Kovtonyuk SA, Lapitskaya IL, Gudoshnikov SA, Kiviranta M et al. A femtoamperemeter based on a superconducting quantum interferometer and a bulk transformer. Journal of Communications Technology and Electronics. 2003;48(12):1404-1409.