Three axis SQUID magnetometer for low-frequency geophysical applications

Author

Kawai, Jun ; Uehara, Gen ; Kohrin, Toshiyuki ; Ogata, Hisanao ; Kado, Hisashi

Author_Institution

Appl. Electron. Lab., Kanazawa Inst. of Technol., Ishikawa, Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3974

Lastpage

3976

Abstract

We have developed a compact low-Tc three axis superconducting quantum interference device magnetometer (SQUID magnetometer) for geophysical applications at low frequency from dc up to 1 kHz, such as for searching for magnetized metals buried under the ground or moving magnetized objects, and for measurements of the geomagnetic fields. Relaxation oscillation SQUIDs (ROSs) which have larger voltage outputs compared to that of standard SQUIDs have been used so that larger dynamic performance is obtained for stable operation in the field

Keywords

SQUID magnetometers; buried object detection; geomagnetism; geophysical equipment; geophysical prospecting; 1 Hz to 1 kHz; GFRP cryostat; buried magnetized metals; flux locked loop; geomagnetic field measurements; larger dynamic performance; low-frequency geophysical applications; moving magnetized objects; relaxation oscillation SQUIDs; reliability; slewing rate; stable operation; three axis SQUID magnetometer; Frequency measurement; Geomagnetism; Geophysical measurements; Interference; Magnetic devices; Magnetic field measurement; SQUID magnetometers; Superconducting devices; Superconducting magnets; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800726

Filename

800726