Magnetic Noise of Small Stirling Coolers

A heart scanner that can be equipped with up to 25 SQUID magnetometers was designed at the University of Twente. In this design the mechanical cooler interference is reduced by operating two coolers in counterphase. The magnetic cooler interference diminished by positioning the coolers and the SQUIDs in a coplanar arrangement, and by separating the SQUIDs from the cold tips of the cryocoolers with a solid conducting thermal interface.In the present paper the construction of this cryogen-free SQUID system is described and test results are presented. A SQUID plate temperature of 60 K was realized in about 2 hours. The corresponding heat load to the coolers is roughly 0.9 W. With a preliminary magnetic shield around the compressors a noise level of 0.6 was measured in the frequency band 10 to 100 Hz and magnetocardiograms were recorded inside a magnetically shielded room. A further reduction of the noise level is expected after optimizing the mumetal shielding of the compressors.

show abstract

Construction and Tests of a High-Tc SQUID-Based Heart Scanner Cooled by Small Stirling Cryocoolers

Blom

Brake

Holland

et al. 2002

Cryocoolers 10

View full text Add to dashboard Cite

show abstract

Stirling Cooler Magnetic Interference Measured by a High-Tc SQUID Mounted on the Cold Tip

1997

View full text Add to dashboard Cite

Reduction of the Vibration Generated by Stirling Cryocoolers Used for Cooling a High-Tc SQUID Magnetometer

et al. 1995

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Magnetic Noise of Small Stirling Coolers

Cited by 8 publications

References 2 publications

Construction and Tests of a High-Tc SQUID-Based Heart Scanner Cooled by Small Stirling Cryocoolers

Construction and Tests of a High-Tc SQUID-Based Heart Scanner Cooled by Small Stirling Cryocoolers

Stirling Cooler Magnetic Interference Measured by a High-Tc SQUID Mounted on the Cold Tip

Reduction of the Vibration Generated by Stirling Cryocoolers Used for Cooling a High-Tc SQUID Magnetometer

Contact Info

Product

Resources

About