Quantitative Study of Laser Cooling in a Penning Trap

  • W. M. Itano
  • L. R. Brewer
  • D. J. Larson
  • J. J. Bollinger
  • S. L. Gilbert
  • D. J. Wineland
Conference paper

Abstract

Penning traps are currently being studied at our laboratory [1,2] and elsewhere [3,4] for use in atomic frequency standards. A Penning trap confines ions by a combination of a static, uniform magnetic field and a static, nonuniform electric field. The fact that the fields are static makes it feasible to laser cool more than 104 ions to low temperatures [5]. In contrast, the radio-frequency (Paul) ion trap uses oscillating electric fields, which, in combination with the non­linear Coulomb coupling between ions, cause heating and make it difficult to laser cool large numbers of ions [6]. For either trap, large numbers increase the signal-to-noise ratio; low temperatures reduce the second-order Doppler shift [7].

Keywords

Torque Boulder 

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Copyright information

© Springer-Verlag Berlin, Heidelberg 1989

Authors and Affiliations

  • W. M. Itano
    • 1
  • L. R. Brewer
    • 1
  • D. J. Larson
    • 1
  • J. J. Bollinger
    • 1
  • S. L. Gilbert
    • 1
  • D. J. Wineland
    • 1
  1. 1.National Institute of Standards and TechnologyBoulderUSA

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