Applied Physics B

, Volume 96, Issue 4, pp 763–772

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

  • N. Castagna
  • G. Bison
  • G. Di Domenico
  • A. Hofer
  • P. Knowles
  • C. Macchione
  • H. Saudan
  • A. Weis
Article

DOI: 10.1007/s00340-009-3464-5

Cite this article as:
Castagna, N., Bison, G., Di Domenico, G. et al. Appl. Phys. B (2009) 96: 763. doi:10.1007/s00340-009-3464-5

Abstract

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, Γ01, and transverse, Γ02, relaxation rates. Our best cell shows Γ01/2π≈0.5 Hz, and Γ02/2π≈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 \(\sqrt{\mathrm{Hz}}\) . Noise analysis shows that the magnetometers operated with such cells have a sensitivity close to the fundamental photon shot noise limit.

PACS

07.55.Ge 32.30.Rj 32.60+i 32.80.Xx 

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • N. Castagna
    • 1
  • G. Bison
    • 2
  • G. Di Domenico
    • 1
    • 3
  • A. Hofer
    • 1
  • P. Knowles
    • 1
  • C. Macchione
    • 1
  • H. Saudan
    • 1
  • A. Weis
    • 1
  1. 1.Université de FribourgFribourgSwitzerland
  2. 2.Klinik für NeurologieUniversitätsklinikums JenaJenaGermany
  3. 3.Laboratoire Temps-FréquenceUniversité de NeuchâtelNeuchâtelSwitzerland