Effect of parasitic capacitance on DC squid performance

Tapani Ryhänen, Robin Cantor, Dietmar Drung, Hans Koch, Heikki Seppä

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

The effect of parasitic capacitance Cp on DC SQUID characteristics and noise performance has been studied using a test structure consisting of 11 identical SQUID washers with Nb films of various widths covering the slit. The measured I-V characteristics are in good agreement with simulations based on a simple lumped circuit model. The energy resolution ε in seems to scale roughly according to in approximately ε ≈ γkBT √L(C+2Cp), where γ is a dimensionless constant, kB is the Boltzmann constant, T is the temperature, C is the junction capacitance, and L is the inductance.
Original languageEnglish
Pages (from-to)3013 - 3016
Number of pages4
JournalIEEE Transactions on Magnetics
Volume27
Issue number2
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

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SQUIDs
Capacitance
Washers
Theophylline
Inductance
Networks (circuits)
Temperature

Cite this

Ryhänen, Tapani ; Cantor, Robin ; Drung, Dietmar ; Koch, Hans ; Seppä, Heikki. / Effect of parasitic capacitance on DC squid performance. In: IEEE Transactions on Magnetics. 1991 ; Vol. 27, No. 2. pp. 3013 - 3016.
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abstract = "The effect of parasitic capacitance Cp on DC SQUID characteristics and noise performance has been studied using a test structure consisting of 11 identical SQUID washers with Nb films of various widths covering the slit. The measured I-V characteristics are in good agreement with simulations based on a simple lumped circuit model. The energy resolution ε in seems to scale roughly according to in approximately ε ≈ γkBT √L(C+2Cp), where γ is a dimensionless constant, kB is the Boltzmann constant, T is the temperature, C is the junction capacitance, and L is the inductance.",
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Ryhänen, T, Cantor, R, Drung, D, Koch, H & Seppä, H 1991, 'Effect of parasitic capacitance on DC squid performance', IEEE Transactions on Magnetics, vol. 27, no. 2, pp. 3013 - 3016. https://doi.org/10.1109/20.133844

Effect of parasitic capacitance on DC squid performance. / Ryhänen, Tapani; Cantor, Robin; Drung, Dietmar; Koch, Hans; Seppä, Heikki.

In: IEEE Transactions on Magnetics, Vol. 27, No. 2, 1991, p. 3013 - 3016.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Effect of parasitic capacitance on DC squid performance

AU - Ryhänen, Tapani

AU - Cantor, Robin

AU - Drung, Dietmar

AU - Koch, Hans

AU - Seppä, Heikki

N1 - Project code: SÄH1201

PY - 1991

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AB - The effect of parasitic capacitance Cp on DC SQUID characteristics and noise performance has been studied using a test structure consisting of 11 identical SQUID washers with Nb films of various widths covering the slit. The measured I-V characteristics are in good agreement with simulations based on a simple lumped circuit model. The energy resolution ε in seems to scale roughly according to in approximately ε ≈ γkBT √L(C+2Cp), where γ is a dimensionless constant, kB is the Boltzmann constant, T is the temperature, C is the junction capacitance, and L is the inductance.

U2 - 10.1109/20.133844

DO - 10.1109/20.133844

M3 - Article

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

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