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Design and performance of an absolute 3He/Cs magnetometer

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

Abstract

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.

Graphical abstract

Keywords

Atomic Physics 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Hans-Christian Koch
    • 1
    • 2
  • Georg Bison
    • 3
  • Zoran D. Grujić
    • 1
  • Werner Heil
    • 2
  • Malgorzata Kasprzak
    • 1
  • Paul Knowles
    • 1
  • Andreas Kraft
    • 2
  • Anatoly Pazgalev
    • 5
  • Allard Schnabel
    • 4
  • Jens Voigt
    • 4
  • Antoine Weis
    • 1
  1. 1.Physics DepartmentUniversity of FribourgFribourgSwitzerland
  2. 2.Department of PhysicsJohannes Gutenberg-UniversityMainzGermany
  3. 3.Paul Scherrer InstituteVilligenSwitzerland
  4. 4.Physikalisch-Technische Bundesanstalt InstitutBerlinGermany
  5. 5.Ioffe Physical Technical InstituteRussian Academy of SciencesSt. PetersburgRussia

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