Interference characterization of cryocoolers for a high-Tc SQUID-based fetal heart monitor

A.P. Rijpma; M.R. Bangma; H.A. Reincke; E. de Vries; H.J. Holland; H.J.M. ter Brake; H. Rogalla

doi:10.1007/0-306-47112-4_96

Interference characterization of cryocoolers for a high-Tc SQUID-based fetal heart monitor

A.P. Rijpma, M.R. Bangma, H.A. Reincke, E. de Vries, H.J. Holland, H.J.M. ter Brake, H. Rogalla

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic

Abstract

The FHARMON-project at the University of Twente aims at a high-Tc SQUID based fetal heart monitor for use in standard clinical environments. Besides the suppression of environmental magnetic noise, the cooling of this fetal heart monitor is an important issue. For maximum flexibility, we intend to apply a closed-cycle cryocooler instead of a liquid nitrogen cryostat. Because of the extreme sensitivity of SQUID magnetometers, the interference caused by the cryocooler is of major importance. This concerns electromagnetic interference (EMI), mechanical vibrations and temperature fluctuations. We have developed measuring techniques to characterize coolers in this respect. The characterization procedures were tested on a Signaal USFA 7058 Stirling cooler and a Leybold RGD210 GM-cooler. In the paper the measuring techniques are described along with interference characteristics of an APD Cryotiger and a Ricor/AirLiquide K535 Stirling cooler. Also, the impact on the design of the fetal heart monitor is considered.

Original language	English
Title of host publication	Cryocoolers 11
Editors	R.G. Ross Jr.
Place of Publication	Boston, MA
Publisher	Springer
Pages	793-802
Number of pages	10
ISBN (Electronic)	978-0-306-47112-4
ISBN (Print)	978-0-306-46567-3
DOIs	https://doi.org/10.1007/0-306-47112-4_96
Publication status	Published - 20 Jun 2001
Event	11th International Cryocooler Conference, Cryocoolers-11 2000 - Keystone, United States Duration: 20 Jun 2000 → 22 Jun 2000 Conference number: 11

Conference

Conference	11th International Cryocooler Conference, Cryocoolers-11 2000
Abbreviated title	Cryocoolers
Country/Territory	United States
City	Keystone
Period	20/06/00 → 22/06/00

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10.1007/0-306-47112-4_96

1 Poster

Interference characterization of cryocoolers for a high-Tc SQUID based fetal monitor
Rijpma, A. P., Bangma, M. R., Reincke, H. A., Holland, H. J., ter Brake, H. J. M., Rogalla, H. & de Vries, E., 21 Jun 2000. 1 p.
Research output: Contribution to conference › Poster › Other research output

Cite this

@inproceedings{30e6a4da45b042e384450f26ac28e94b,

title = "Interference characterization of cryocoolers for a high-Tc SQUID-based fetal heart monitor",

abstract = "The FHARMON-project at the University of Twente aims at a high-Tc SQUID based fetal heart monitor for use in standard clinical environments. Besides the suppression of environmental magnetic noise, the cooling of this fetal heart monitor is an important issue. For maximum flexibility, we intend to apply a closed-cycle cryocooler instead of a liquid nitrogen cryostat. Because of the extreme sensitivity of SQUID magnetometers, the interference caused by the cryocooler is of major importance. This concerns electromagnetic interference (EMI), mechanical vibrations and temperature fluctuations. We have developed measuring techniques to characterize coolers in this respect. The characterization procedures were tested on a Signaal USFA 7058 Stirling cooler and a Leybold RGD210 GM-cooler. In the paper the measuring techniques are described along with interference characteristics of an APD Cryotiger and a Ricor/AirLiquide K535 Stirling cooler. Also, the impact on the design of the fetal heart monitor is considered.",

author = "A.P. Rijpma and M.R. Bangma and H.A. Reincke and {de Vries}, E. and H.J. Holland and {ter Brake}, H.J.M. and H. Rogalla",

year = "2001",

month = jun,

day = "20",

doi = "10.1007/0-306-47112-4_96",

language = "English",

isbn = "978-0-306-46567-3",

pages = "793--802",

editor = "{Ross Jr.}, R.G.",

booktitle = "Cryocoolers 11",

publisher = "Springer",

address = "Germany",

note = "11th International Cryocooler Conference, Cryocoolers-11 2000, Cryocoolers ; Conference date: 20-06-2000 Through 22-06-2000",

}

Rijpma, AP, Bangma, MR, Reincke, HA, de Vries, E, Holland, HJ , ter Brake, HJM & Rogalla, H 2001, Interference characterization of cryocoolers for a high-Tc SQUID-based fetal heart monitor. in RG Ross Jr. (ed.), Cryocoolers 11. Springer, Boston, MA, pp. 793-802, 11th International Cryocooler Conference, Cryocoolers-11 2000, Keystone, Colorado, United States, 20/06/00. https://doi.org/10.1007/0-306-47112-4_96

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T1 - Interference characterization of cryocoolers for a high-Tc SQUID-based fetal heart monitor

AU - Rijpma, A.P.

AU - Bangma, M.R.

AU - Reincke, H.A.

AU - de Vries, E.

AU - Holland, H.J.

AU - ter Brake, H.J.M.

AU - Rogalla, H.

N1 - Conference code: 11

PY - 2001/6/20

Y1 - 2001/6/20

N2 - The FHARMON-project at the University of Twente aims at a high-Tc SQUID based fetal heart monitor for use in standard clinical environments. Besides the suppression of environmental magnetic noise, the cooling of this fetal heart monitor is an important issue. For maximum flexibility, we intend to apply a closed-cycle cryocooler instead of a liquid nitrogen cryostat. Because of the extreme sensitivity of SQUID magnetometers, the interference caused by the cryocooler is of major importance. This concerns electromagnetic interference (EMI), mechanical vibrations and temperature fluctuations. We have developed measuring techniques to characterize coolers in this respect. The characterization procedures were tested on a Signaal USFA 7058 Stirling cooler and a Leybold RGD210 GM-cooler. In the paper the measuring techniques are described along with interference characteristics of an APD Cryotiger and a Ricor/AirLiquide K535 Stirling cooler. Also, the impact on the design of the fetal heart monitor is considered.

AB - The FHARMON-project at the University of Twente aims at a high-Tc SQUID based fetal heart monitor for use in standard clinical environments. Besides the suppression of environmental magnetic noise, the cooling of this fetal heart monitor is an important issue. For maximum flexibility, we intend to apply a closed-cycle cryocooler instead of a liquid nitrogen cryostat. Because of the extreme sensitivity of SQUID magnetometers, the interference caused by the cryocooler is of major importance. This concerns electromagnetic interference (EMI), mechanical vibrations and temperature fluctuations. We have developed measuring techniques to characterize coolers in this respect. The characterization procedures were tested on a Signaal USFA 7058 Stirling cooler and a Leybold RGD210 GM-cooler. In the paper the measuring techniques are described along with interference characteristics of an APD Cryotiger and a Ricor/AirLiquide K535 Stirling cooler. Also, the impact on the design of the fetal heart monitor is considered.

U2 - 10.1007/0-306-47112-4_96

DO - 10.1007/0-306-47112-4_96

M3 - Conference contribution

SN - 978-0-306-46567-3

SP - 793

EP - 802

BT - Cryocoolers 11

A2 - Ross Jr., R.G.

PB - Springer

CY - Boston, MA

T2 - 11th International Cryocooler Conference, Cryocoolers-11 2000

Y2 - 20 June 2000 through 22 June 2000

ER -

Interference characterization of cryocoolers for a high-Tc SQUID-based fetal heart monitor

Abstract

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Interference characterization of cryocoolers for a high-Tc SQUID based fetal monitor

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