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Progress in the evaluation and operation of the NRC strontium single ion frequency standard as an optical atomic clock

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7 Author(s)
Madej, A.A. ; Freq. & Time Group, Nat. Res. Council of Canada, Ottawa, ON, Canada ; Dubé, P. ; Bernard, J.E. ; Humphrey, G.
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Improved functionality and accuracy of the NRC Sr+ single trapped ion 445-THz standard is described. Absolute frequency stabilization of all laser sources has been achieved together with loading of the ion trap using photo-ionization methods. An Erbium fiber laser based frequency comb is used to directly measure the 445-THz clock frequency. A 9 hr preliminary measurement was performed with statistical uncertainty of 1.4 Hz (3×10-15) in excellent agreement with a previously reported value in 2005. A new endcap trap with probing and micromotion correction in three dimensions has been assembled and will have uncertainties approaching 10-17 in the near future.

Published in:

Precision Electromagnetic Measurements (CPEM), 2010 Conference on

Date of Conference:

13-18 June 2010

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