A SQUID system for geophysical measurements cooled by a pulse tube cryocooler. (8th June 2018)

• Record Type: Journal Article
• Authors: Schmidt, Bernd; Falter, Jens; Schirmeisen, André; Mück, Michael
• Is Part Of: Superconductor science & technology. Volume 31:Number 7(2018:Jul.)
• Publication Date: 2018-06-08
• Subjects: pulse tube cooler -- cryocooler -- SQUID -- transient electromagnetic measurement -- geophysics -- dry cooling; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/1361-6668/aac66d
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: Geophysical measurements, which rely on the acquisition of magnetic data, can take advantage of a superconducting quantum interference device (SQUID), which offers a higher field sensitivity at lower frequencies than conventional induction coils. Although cooling a SQUID in liquid helium provides for a simple and low-interference system, in remote areas a cryocooler could reduce the expenses of operation. We studied transient magnetic measurements with a SQUID cooled by a small pulse tube cooler operated by a 1 kW compressor, which can be powered by a portable generator or large truck battery.