John D. EIgin, T. Heavner, J. Kitching, E. Donley, Jayson Denney, Evan A. Salim
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We have developed a cold atomic beam coherent population trapping clock with the goal of creating a compact, low power device. The clock employs traditional two-zone Ramsey interrogation performed on the D2 line of an atomic beam of 87Rb generated from a 2D+-MOT. The current fractional frequency instability is $2.5 \times 10^{-11}\tau^{-1/2}$. A preliminary evaluation of systematics and noise limiting the current performance is presented.
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