Ultra low noise induction magnetometer for variable temperature operation

In recent publications, the authors have reported on the performance of compact broadband induction magnetometer systems with an operating bandwidth from 100 μHz to 1 MHz. The best room temperature noise performance achieved was ∼500 fT/√Hz from 10 kHz to 1 MHz. In this paper, we describe improvemen...

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Bibliographic Details
Published in:Sensors and actuators. A, Physical Physical, 2000-08, Vol.85 (1), p.361-364
Main Authors: Prance, R.J., Clark, T.D., Prance, H.
Format: Article
Language:English
Subjects:
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Magnetic components, instruments and techniques
Magnetometer
Magnetometers for magnetic field measurements
Physics
Transducers
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Summary:In recent publications, the authors have reported on the performance of compact broadband induction magnetometer systems with an operating bandwidth from 100 μHz to 1 MHz. The best room temperature noise performance achieved was ∼500 fT/√Hz from 10 kHz to 1 MHz. In this paper, we describe improvements to the coil design and signal processing electronics, which result in a further reduction of the noise (∼50 fT/√Hz, in the range 1–30 kHz). In addition, we have chosen a magnetic material with a very small temperature dependence allowing us to investigate whether a reduction in noise may be achieved by operating the system at a reduced temperature (77 K).
ISSN:0924-4247
1873-3069
DOI:10.1016/S0924-4247(00)00375-7