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# A highly stable atomic vector magnetometer based on free spin precession

Abstract : We present a magnetometer based on optically pumped Cs atoms that measures the magnitude and direction of a 1 $\mu$T magnetic field. Multiple circularly polarized laser beams were used to probe the free spin precession of the Cs atoms. The design was optimized for long-time stability and achieves a scalar resolution better than 300 fT for integration times ranging from 80 ms to 1000 s. The best scalar resolution of less than 80 fT was reached with integration times of 1.6 to 6 s. We were able to measure the magnetic field direction with a resolution better than 10 $\mu$rad for integration times from 10 s up to 2000 s.
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Journal articles
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http://hal.in2p3.fr/in2p3-01213941
Contributor : Sandrine Guesnon <>
Submitted on : Friday, October 9, 2015 - 2:22:42 PM
Last modification on : Tuesday, October 6, 2020 - 4:30:48 PM

### Citation

S. Afach, G. Ban, G. Bison, K. Bodek, Z. Chowdhuri, et al.. A highly stable atomic vector magnetometer based on free spin precession. Optics Express, Optical Society of America - OSA Publishing, 2015, 23 (17), pp.22108-22115. ⟨10.1364/OE.23.022108⟩. ⟨in2p3-01213941⟩

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