Journal article

Design and performance of laser-pumpedCs-magnetometers for the planned UCN EDMExperiment at PSI

  • Groeger, Stephan Physics Department, Université de Fribourg, Switzerland - Paul Scherrer Institute, Villingen PSI, Switzerland
  • Bison, Georg Physics Department, Université de Fribourg, Switzerland
  • Weis, Antoine Physics Department, Université de Fribourg, Switzerland
Published in:
  • Journal of Research of the National Institute of Standards and Technology. - 2005, vol. 110, p. 179-183
English We designed laser-pumped cesium vapor magnetometers in the Mx 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.
Faculté des sciences et de médecine
Département de Physique
  • English
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