Temperature dependence of the effective sensing area of high-Τc dc SQUIDs

H.J.M. ter Brake; W.A.M. Aarnink; P.J. van den Bosch; J.W.M. Hilgenkamp; J. Flokstra; H. Rogalla

doi:10.1088/0953-2048/10/7/009

Temperature dependence of the effective sensing area of high-Τ_c dc SQUIDs

H.J.M. ter Brake
, W.A.M. Aarnink
, P.J. van den Bosch
, J.W.M. Hilgenkamp
, J. Flokstra
, H. Rogalla

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

13 Citations (Scopus)

4 Downloads (Pure)

Abstract

The effective sensing area of a high-T_c dc SQUID depends on temperature. As a consequence, fluctuations in the operating temperature result in apparent magnetic field noise if the SQUID is placed in a background magnetic field. An analysis of this effect for two SQUID types, the square-washer 'Ketchen' type and the inductively shunted type, is performed. For magnetocardiography, the temperature fluctuations (peak to peak) of the latter SQUID type should be below w0.3 mK at 77 K, and below 2 mK at 55 K, with an earth's field suppression of 40 dB. For the square-washer SQUID the requirements are about 8 times less stringent.

Original language	English
Pages (from-to)	512-515
Number of pages	4
Journal	Superconductor science and technology
Volume	10
Issue number	7
DOIs	https://doi.org/10.1088/0953-2048/10/7/009
Publication status	Published - 1997

Keywords

2020 OA procedure

Access to Document

10.1088/0953-2048/10/7/009

ArticleFinal published version, 76.5 KBLicence: Taverne

Cite this

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title = "Temperature dependence of the effective sensing area of high-Τc dc SQUIDs",

abstract = "The effective sensing area of a high-Tc dc SQUID depends on temperature. As a consequence, fluctuations in the operating temperature result in apparent magnetic field noise if the SQUID is placed in a background magnetic field. An analysis of this effect for two SQUID types, the square-washer 'Ketchen' type and the inductively shunted type, is performed. For magnetocardiography, the temperature fluctuations (peak to peak) of the latter SQUID type should be below w0.3 mK at 77 K, and below 2 mK at 55 K, with an earth's field suppression of 40 dB. For the square-washer SQUID the requirements are about 8 times less stringent.",

keywords = "2020 OA procedure",

author = "\{ter Brake\}, H.J.M. and W.A.M. Aarnink and \{van den Bosch\}, P.J. and J.W.M. Hilgenkamp and J. Flokstra and H. Rogalla",

year = "1997",

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language = "English",

volume = "10",

pages = "512--515",

journal = "Superconductor science and technology",

issn = "0953-2048",

publisher = "Institute of Physics (IOP)",

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TY - JOUR

T1 - Temperature dependence of the effective sensing area of high-Τc dc SQUIDs

AU - ter Brake, H.J.M.

AU - Aarnink, W.A.M.

AU - van den Bosch, P.J.

AU - Hilgenkamp, J.W.M.

AU - Flokstra, J.

AU - Rogalla, H.

PY - 1997

Y1 - 1997

N2 - The effective sensing area of a high-Tc dc SQUID depends on temperature. As a consequence, fluctuations in the operating temperature result in apparent magnetic field noise if the SQUID is placed in a background magnetic field. An analysis of this effect for two SQUID types, the square-washer 'Ketchen' type and the inductively shunted type, is performed. For magnetocardiography, the temperature fluctuations (peak to peak) of the latter SQUID type should be below w0.3 mK at 77 K, and below 2 mK at 55 K, with an earth's field suppression of 40 dB. For the square-washer SQUID the requirements are about 8 times less stringent.

AB - The effective sensing area of a high-Tc dc SQUID depends on temperature. As a consequence, fluctuations in the operating temperature result in apparent magnetic field noise if the SQUID is placed in a background magnetic field. An analysis of this effect for two SQUID types, the square-washer 'Ketchen' type and the inductively shunted type, is performed. For magnetocardiography, the temperature fluctuations (peak to peak) of the latter SQUID type should be below w0.3 mK at 77 K, and below 2 mK at 55 K, with an earth's field suppression of 40 dB. For the square-washer SQUID the requirements are about 8 times less stringent.

KW - 2020 OA procedure

U2 - 10.1088/0953-2048/10/7/009

DO - 10.1088/0953-2048/10/7/009

M3 - Article

SN - 0953-2048

VL - 10

SP - 512

EP - 515

JO - Superconductor science and technology

JF - Superconductor science and technology

IS - 7

ER -