Three component spinner magnetometer featuring rapid measurement times

Author

Leslie, K.E. ; Binks, R.A. ; Lewis, C.J. ; Scott, M.D. ; Tilbrook, D.L. ; Du, J.

Author_Institution

Telecommun. & Ind. Phys., CSIRO, Sydney, NSW, Australia

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

252

Lastpage

255

Abstract

We describe the fabrication and performance of a spinning rock magnetometer for measuring the intensity and direction of the remanent magnetisation of rock specimens collected in palaeomagnetic surveys. The strength of these fields is measured using a high temperature superconductor (HTS) rf SQUID. Samples are rotated around two orthogonal axes to facilitate the calculation of the three-component remanence vector with a minimum of operator intervention. Measurements of remanence values ranging from 10¹ to 10^-5 A/m, with errors of 1×10^-5 A/m, have been achieved in measurement times of 20 s, while operating the instrument in a typical geophysical laboratory environment. In this paper we discuss the design requirements and data processing necessary to achieve a user-friendly system

Keywords

SQUID magnetometers; geophysical equipment; high-temperature superconductors; palaeomagnetism; remanence; rock magnetism; 20 s; high temperature superconductor RF SQUID; measurement time; palaeomagnetic survey; remanent magnetisation; rock specimen; three-component spinner magnetometer; Data processing; Fabrication; Geophysical measurements; High temperature superconductors; Instruments; Magnetic field measurement; Magnetization; Remanence; SQUID magnetometers; Spinning;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919331

Filename

919331