Compact room-temperature induction magnetometer with superconducting quantum interference device level field sensitivity

Prance, R J, Clark, T D and Prance, H (2003) Compact room-temperature induction magnetometer with superconducting quantum interference device level field sensitivity. Review of Scientific Instruments, 74 (8). pp. 3735-3739. ISSN 0034-6748

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Abstract

In this article, we describe significant developments in the design and construction of robust and compact room-temperature induction magnetometers with magnetic field sensitivities comparable to those usually associated only with superconducting quantum interference device (SQUID) magnetometers operating at cryogenic temperatures. In this system, we make use of both temperature independent amorphous magnetic core materials and ultralow noise signal processing electronics to achieve a spot noise figure of 14¿fT/ at 300 Hz measured in a specially constructed, very low field environment. We present results over an operating bandwidth of 30 mHz to 3 kHz and show that linearity is preserved over almost six decades in an applied magnetic field amplitude. We compare the spectral noise of our systems with recently published data on SQUID magnetometers. © 2003 American Institute of Physics.

Item Type: Article
Additional Information: This paper reports experimental work undertaken by RJ Prance and myself arising from our extensive experience of low-noise analogue circuit design and ultra sensitive magnetometry at both room and cryogenic temperatures. A magnetometer with field sensitivity comparable with a SQUID is described. It forms part of our ongoing research programme on the development of electric and magnetic sensors. The paper was selected for inclusion in the Virtual Journal of Applications of Superconductivity. It has since formed the basis for an invited review article on `induction magnetometer systems¿ published in the Encyclopedia of Sensors. Reports experimental work directed by R J Prance and supported by myself.
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Robert Prance
Date Deposited: 06 Feb 2012 20:14
Last Modified: 24 Jun 2015 12:17
URI: http://sro.sussex.ac.uk/id/eprint/24873
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