The NRC Publications Archive is now operational; however, not all the features of the site are available at this time.
The following features remain unavailable:
- Viewing/Downloading of full text publications
NRC is currently working to restore these features and we will update this notice as these features become available. Thank you for your patience.
Systematic shift evaluation of the NRC 88Sr+ single-ion optical frequency standard to a few parts in 10^-17
; Dubé, P.
; Madej, A. A.
; Bernard, J. E.
NRC Institute for National Measurement Standards; National Research Council Canada
2012 IEEE International Frequency Control Symposium (FCS), 21-24 May 2012, Baltimore, MD, USA
2012 IEEE International Frequency Control Symposium
A new strontium ion trap of the endcap design was built recently at the National Research Council of Canada for better control of the micromotion shifts. The uncertainty caused by these shifts has been reduced by more than four orders of magnitude compared to the original NRC trap, down to a level of ≈ 10-18. In this paper we discuss the evaluation of micromotion shifts and of several other sources of importance to optical frequency standards based on single ions. The total fractional frequency uncertainty of the new strontium ion trap system is estimated to be ≈ 2 × 10-17, limited by the blackbody radiation shift. A preliminary measurement of the clock transition frequency with a fractional uncertainty of 2×10-15, limited by the accuracy of the maser reference, is also presented.