Design and performance of an absolute 3He/Cs magnetometer

Koch, Hans-Christian; Bison, Georg; Grujić, Zoran D.; Heil, Werner; Kasprzak, Malgorzata; Knowles, Paul E.; Kraft, Andreas; Pazgalev, Anatoly; Schnabel, Allard; Voigt, Jens; Weis, Antoine

doi:10.1140/epjd/e2015-60018-7

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Journal article

Design and performance of an absolute 3He/Cs magnetometer

Koch, Hans-Christian Physics Department, University of Fribourg, Switzerland - Department of Physics, Johannes Gutenberg-University, Mainz, Germany
Bison, Georg Paul Scherrer Institute, Villigen, Switzerland
Grujić, Zoran D. Physics Department, University of Fribourg, Switzerland
Heil, Werner Department of Physics, Johannes Gutenberg-University, Mainz, Germany
Kasprzak, Malgorzata Physics Department, University of Fribourg, Switzerland
Knowles, Paul E. Physics Department, University of Fribourg, Switzerland
Kraft, Andreas Department of Physics, Johannes Gutenberg-University, Mainz, Germany
Pazgalev, Anatoly Ioffe Physical Technical Institute, Russian Academy of Sciences, St. Petersburg, Russia
Schnabel, Allard Physikalisch-Technische Bundesanstalt Institut, Berlin, Germany
Voigt, Jens Physikalisch-Technische Bundesanstalt Institut, Berlin, Germany
Weis, Antoine Physics Department, University of Fribourg, Switzerland

21.08.2015

Published in:

The European Physical Journal D. - 2015, vol. 69, no. 8, p. 1–12

English We report on the design and performance of a highly sensitive combined ³He/Cs magnetometer for the absolute measurement of magnetic fields. The magnetometer relies on the magnetometric detection of the free spin precession of nuclear spin polarized ³He gas by optically pumped cesium magnetometers. We plan to deploy this type of combined magnetometer in an experiment searching for a permanent electric dipole moment of ultracold neutrons at the Paul-Scherrer Institute (Switzerland). A prototype magnetometer was built at the University of Fribourg (Switzerland) and tested at Physikalisch-Technische Bundesanstalt (Berlin, Germany). We demonstrate that the combined magnetometer allows Cramér-Rao-limited field determinations with recording times in the range of, measurements above being limited by the stability of the applied magnetic field. With a recording time we were able to perform an absolute measurement of a magnetic field of ≈ with a standard uncertainty of, corresponding to ΔB/B < 6 ×10⁻⁸.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

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