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Discussion papers | Copyright
https://doi.org/10.5194/gi-2018-29
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 19 Jun 2018

Research article | 19 Jun 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Instrumentation, Methods and Data Systems (GI).

A Hybrid Fluxgate and Search Coil Magnetometer Concept Using a Racetrack Core

David M. Miles1,2, B. Barry Narod3, David K. Milling2, Ian R. Mann2, David Barona2, and George B. Hospodarsky1 David M. Miles et al.
  • 1Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa, USA
  • 2Department of Physics, University of Alberta, Edmonton, Alberta, Canada
  • 3Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada

Abstract. A proof-of-concept hybrid magnetometer is presented which simultaneously operates as both a fluxgate and a search coil allowing it to sense the magnetic field from DC to two kHz using a single sensor. Historically, such measurements would normally require two dedicated instruments and each would typically require deployment on its own dedicated boom as the instruments mutually interfere. A racetrack fluxgate core combined with a long solenoidal sense winding is shown to be moderately effective as a search coil magnetometer and the search coil effect can be captured without introducing significant hardware complexity beyond what is already present in a typical fluxgate instrument. Several methods of optimizing the search coil action of the hybrid instrument are compared with the best providing sensitivity and noise performance between comparably sized traditional air core and solid core search coil instruments. This hybrid sensor topology should miniaturize to platforms such a CubeSats where multiple boom-mounted instruments are generally impractical so a single hybrid instrument providing modest, but scientifically useful, sensitivity from DC to kHz frequencies would be beneficial.

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Data for A Hybrid Fluxgate and Search Coil Magnetometer Concept Using a Racetrack Core D. M. Miles https://doi.org/10.25820/t6pr-1551

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Latest update: 18 Sep 2018
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Short summary
We present a proof-of concept space-flight instrument that can simultaneously make measurements of both the low and high frequency local magnetic field. Previously, this would have required two separate instruments that would normally have had to be mounted separately on long deployable booms to keep them from interfering. This new hybrid instrument is expected to be particularly useful on extremely small spacecraft, such as CubeSats, which can only accommodate few instruments.
We present a proof-of concept space-flight instrument that can simultaneously make measurements...
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