Precise measurement of magnetic field gradients from free spin precession signals of 3He and 129Xe magnetometers

  • Fabian Allmendinger
  • Peter Blümler
  • Michael Doll
  • Olivier Grasdijk
  • Werner Heil
  • Klaus Jungmann
  • Sergej Karpuk
  • Hans-Joachim Krause
  • Andreas Offenhäusser
  • Maricel Repetto
  • Ulrich Schmidt
  • Yuri Sobolev
  • Kathlynne Tullney
  • Lorenz Willmann
  • Stefan Zimmer
Regular Article

DOI: 10.1140/epjd/e2017-70505-4

Cite this article as:
Allmendinger, F., Blümler, P., Doll, M. et al. Eur. Phys. J. D (2017) 71: 98. doi:10.1140/epjd/e2017-70505-4
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Abstract

We report on precise measurements of magnetic field gradients extracted from transverse relaxation rates of precessing spin samples. The experimental approach is based on the free precession of gaseous, nuclear spin polarized 3He and 129Xe atoms in a spherical cell inside a magnetic guiding field of about 400 nT using LTC SQUIDs as low-noise magnetic flux detectors. The transverse relaxation rates of both spin species are simultaneously monitored as magnetic field gradients are varied. For transverse relaxation times reaching 100 h, the residual longitudinal field gradient across the spin sample could be deduced to be |Bz| = (5.6 ± 0.2) pT/cm. The method takes advantage of the high signal-to-noise ratio with which the decaying spin precession signal can be monitored that finally leads to the exceptional accuracy to determine magnetic field gradients at the sub pT/cm scale.

Graphical abstract

Keywords

Atomic Physics 

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Fabian Allmendinger
    • 1
  • Peter Blümler
    • 2
  • Michael Doll
    • 2
  • Olivier Grasdijk
    • 3
  • Werner Heil
    • 2
  • Klaus Jungmann
    • 3
  • Sergej Karpuk
    • 2
  • Hans-Joachim Krause
    • 4
  • Andreas Offenhäusser
    • 4
  • Maricel Repetto
    • 2
  • Ulrich Schmidt
    • 1
  • Yuri Sobolev
    • 2
  • Kathlynne Tullney
    • 2
  • Lorenz Willmann
    • 3
  • Stefan Zimmer
    • 2
  1. 1.Physikalisches Institut, Ruprecht-Karls-UniversitätHeidelbergGermany
  2. 2.Institut für Physik, Johannes Gutenberg-UniversitätMainzGermany
  3. 3.Van Swinderen Institute, Faculty of Science and Engineering, University of GroningenGroningenThe Netherlands
  4. 4.Peter Grünberg InstituteJülichGermany

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