A highly stable atomic vector magnetometer based on free spin precession

S. Afach 1 G. Ban 2 G. Bison 1 K. Bodek Z. Chowdhuri 1 Z. D. Grujic L. Hayen V. Helaine 2 M. Kasprzak K. Kirch 1 P. Knowles H. -C. Koch S. Komposch 1 A. Kozela J. Krempel B. Lauss 1 T. Lefort 2 Y. Lemière 2 A. Mtchedlishvili 1 O. Naviliat-Cuncic 2 F. M. Piegsa P. N. Prashanth 1 G. Quéméner 2 M. Rawlik D. Ries 1 S. Roccia 3 D. Rozpedzik P. Schmidt-Wellenburg 1 N. Severjins A. Weis E. Wursten G. Wyszynski J. Zejma G. Zsigmond 1
1 PSI - Paul Scherrer Institute
2 LPCC - Laboratoire de physique corpusculaire de Caen
3 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
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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Submitted on : Friday, October 9, 2015 - 2:22:42 PM
Last modification on : Tuesday, February 19, 2019 - 11:14:01 AM

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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, 2015, 23 (17), pp.22108-22115. ⟨10.1364/OE.23.022108⟩. ⟨in2p3-01213941⟩

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