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Journal Articles Review of Scientific Instruments Year : 2021

A 4He vector zero-field optically pumped magnetometer operated in the Earth-field

Abstract

Low intrinsic noise, high bandwidth and high accuracy vector magnetometers are key components for many ground or space geophysical applications. Here we report the design and the test of a 4He vector optically pumped magnetometer specifically dedicated to these needs. It is based on a parametric resonance magnetometer architecture operated in the Earth magnetic field with closed-loop compensation of the 3 components of the magnetic field. It provides offset-free vector measurements in a ±70 µT range with a DC to 1 kHz bandwidth. We demonstrate a vector sensitivity up to 130 fT/sqrt(Hz), which is about ten times better than the best available fluxgate magnetometers currently available for the same targeted applications.
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Dates and versions

cea-03389609 , version 1 (21-10-2021)

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François Bertrand, Thomas Jager, Axel Boness, William Fourcault, Gwenael Le Gal, et al.. A 4He vector zero-field optically pumped magnetometer operated in the Earth-field. Review of Scientific Instruments, 2021, Volume 92, Issue 10, October 2021, pp.105005. ⟨10.1063/5.0062791⟩. ⟨cea-03389609⟩
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