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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 8,
  • Issue 8,
  • pp. 735-737
  • (2010)

Cold atom space clock with counter-propagating atoms

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Abstract

We discuss the feasibility of realizing a cold atom space clock with counter-propagating cold atoms in microgravity. The design of the space clock is based on an atomic beam clock with Ramsey cavity, except that magneto-optical trap (MOT) is placed at each side. Cold atoms are launched simultaneously from the MOTs at both sides of the clock and they move at the counter-direction towards each other. The velocity of the launched atoms is precisely controlled to Ramsauer-Townsend resonance so that no additional collision frequency shift takes place. Such configuration can efficiently cancel the frequency shift resulting from cavity phase shift and increase the signal-to-noise ratio (SNR).

© 2010 Chinese Optics Letters

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