Journal article

A large sample study of spin relaxation and magnetometric sensitivity of paraffin-coated Cs vapor cells

  • Castagna, Natascia Département de Physique, Université de Fribourg, Switzerland
  • Bison, Georg Klinik für Neurologie, Universitätsklinikums Jena, Germany
  • Di Domenico, Gianni Département de Physique, Université de Fribourg, Switzerland - Laboratoire Temps-Fréquence, Université de Neuchâtel, Switzerland
  • Hofer, Adrian Département de Physique, Université de Fribourg, Switzerland
  • Knowles, Paul E. Département de Physique, Université de Fribourg, Switzerland
  • Macchione, Catherine Département de Physique, Université de Fribourg, Switzerland
  • Saudan, Hervé Département de Physique, Université de Fribourg, Switzerland
  • Weis, Antoine Département de Physique, Université de Fribourg, Switzerland
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    03.04.2009
Published in:
  • Applied Physics B. - 2009, vol. 96, no. 4, p. 763-772
English We have manufactured more than 250 nominally identical paraffin-coated Cs vapor cells (28 mm inner diameter bulbs) for multi-channel atomic magnetometer applications. We describe our dedicated cell characterization apparatus. For each cell we have determined the intrinsic longitudinal, Γ ₀₁, and transverse, Γ ₀₂, relaxation rates. Our best cell shows Γ ₀₁/2π≈0.5 Hz, and Γ ₀₂/2π≈2 Hz. We find a strong correlation of both relaxation rates which we explain in terms of reservoir and spin exchange relaxation. For each cell we have determined the optimal combination of rf and laser powers which yield the highest sensitivity to magnetic field changes. Out of all produced cells, 90% are found to have magnetometric sensitivities in the range of 9 to 30 fT (Hz)½. Noise analysis shows that the magnetometers operated with such cells have a sensitivity close to the fundamental photon shot noise limit.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/301470
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