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Design and Performance of Laser-Pumped Cs-Magnetometers for the Planned UCN EDM Experiment at PSI.

  • Groeger S Université de Fribourg, Chemin de Musée 3, 1700 Fribourg, Switzerland.
  • Bison G Université de Fribourg, Chemin de Musée 3, 1700 Fribourg, Switzerland.
  • Weis A Université de Fribourg, Chemin de Musée 3, 1700 Fribourg, Switzerland.
  • 2016-06-17
Published in:
  • Journal of research of the National Institute of Standards and Technology. - 2005
high precision magnetometry
laser spectroscopy
optical detected magnetic resonance
optical pumping
English We designed laser-pumped cesium vapor magnetometers in the M x configuration for the control and stabilization of magnetic field fluctuations and gradients in a new experiment searching for a permanent electric dipole moment of the neutron. The intrinsic sensitivity of the device was determined to be 30 fT in a measurement bandwidth of 1 Hz, limited by laser noise. In the shot noise limit the magnetometer can reach a sensitivity of 7 fT for 1 s integration time. Test measurements of the stability of a 2 µT magnetic field in a threefold magnetic shield have revealed fluctuations on the order of 200 fT to 300 fT with integration times in the range of 2 s to 100 s. Those fluctuations were traced back to the stability of the power supply used to generate the magnetic field. The laser-pumped magnetometer fulfills the requirements set by the planned neutron electric dipole moment experiment.
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  • English
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bronze
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https://sonar.ch/global/documents/93686
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