Ionic crystals in a linear Paul trap

  • Raizen M
  • Gilligan J
  • Bergquist J
 et al. 
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We describe a configuration for a linear Paul rf ion trap. This trap can store a long string of ions with a small second-order Doppler shift, comparable to that achieved with a single ion in a quadrupole Paul trap. Crystallized strings of trapped ions, as well as more complicated structures, have been observed in the trap. We report an observation of the 40.5-GHz ground-state hyperfine interval of Hg-199(+) by microwave-optical double-resonance spectroscopy and discuss prospects for a microwave frequency standard based on a trapped string of ions.

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  • M. G. Raizen

  • J. M. Gilligan

  • J. C. Bergquist

  • W. M. Itano

  • D. J. Wineland

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