Effect of parasitic capacitance on DC squid performance

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

doi:10.1109/20.133844

Effect of parasitic capacitance on DC squid performance

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

German National Metrology Institute (PTB)

Research output: Contribution to journal › Article › Scientific › peer-review

15 Citations (Scopus)

Abstract

The effect of parasitic capacitance C_p 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 ≈ γk_BT √L(C+2C_p), where γ is a dimensionless constant, k_B is the Boltzmann constant, T is the temperature, C is the junction capacitance, and L is the inductance.

Original language	English
Pages (from-to)	3013 - 3016
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	27
Issue number	2
DOIs	https://doi.org/10.1109/20.133844
Publication status	Published - 1991
MoE publication type	A1 Journal article-refereed

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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.",

author = "Tapani Ryh{\"a}nen and Robin Cantor and Dietmar Drung and Hans Koch and Heikki Sepp{\"a}",

note = "Project code: S{\"A}H1201",

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AU - Ryhänen, Tapani

AU - Cantor, Robin

AU - Drung, Dietmar

AU - Koch, Hans

AU - Seppä, Heikki

N1 - Project code: SÄH1201

PY - 1991

Y1 - 1991

N2 - 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.

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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VL - 27

SP - 3013

EP - 3016

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 2

ER -

Effect of parasitic capacitance on DC squid performance

Abstract

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