Journal article
Low-noise permalloy ring cores for fluxgate magnetometers
Geoscientific instrumentation, methods and data systems, Vol.8(2), pp.227-240
09/06/2019
DOI: 10.5194/gi-8-227-2019
Abstract
Fluxgate magnetometers are important tools for geophysics and space physics, providing high-precision magnetic field measurements. Fluxgate magnetometer noise performance is typically limited by a ferromagnetic element that is periodically forced into magnetic saturation to modulate, or gate, the local magnetic field. The parameters that control the intrinsic magnetic noise of the ferromagnetic element remain poorly understood. Much of the basic research into producing low-noise fluxgate sensors was completed in the 1960s for military purposes and was never publicly released. Many modern fluxgates depend on legacy Infinetics S1000 ring cores that have been out of production since 1996 and for which there is no published manufacturing process. We present a manufacturing approach that can consistently produce fluxgate ring cores with a noise of similar to 6-11 pT per square root hertz - comparable to many of the legacy Infinetics ring cores used worldwide today. As a result, we demonstrate that we have developed the capacity to produce the low-noise ring cores essential for high-quality, science-grade fluxgate instrumentation. This work has also revealed potential avenues for further improving performance, and further research into low-noise magnetic materials and fluxgate magnetometer sensors is underway.
Details
- Title: Subtitle
- Low-noise permalloy ring cores for fluxgate magnetometers
- Creators
- David M. Miles - University of AlbertaMiroslaw Ciurzynski - University of AlbertaDavid Barona - University of AlbertaB. Barry Narod - University of British ColumbiaJohn R. Bennest - Bennest Enterprises Ltd., Summerland, BC, CanadaAndy Kale - University of AlbertaMarc Lessard - University of New HampshireDavid K. Milling - University of AlbertaJoshua Larson - University of IowaIan R. Mann - University of Alberta
- Resource Type
- Journal article
- Publication Details
- Geoscientific instrumentation, methods and data systems, Vol.8(2), pp.227-240
- DOI
- 10.5194/gi-8-227-2019
- ISSN
- 2193-0856
- eISSN
- 2193-0864
- Publisher
- Copernicus Gesellschaft Mbh
- Number of pages
- 14
- Grant note
- Natural Sciences and Engineering Research Council of Canada; Natural Sciences and Engineering Research Council of Canada (NSERC); CGIAR University of Iowa 9F063-140909/006/MTB_PT6_Ringcores / Canadian Space Agency
- Language
- English
- Date published
- 09/06/2019
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428811902771
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