Chinese Optics Letters, 2016, 14 (8): 081201, Published Online: Aug. 3, 2018
Closely interleaved self-comparison method applied to precise measurement Download: 801次
Abstract
A self-comparison method with closely interleaved switching states is analyzed and used to evaluate some type-B uncertainties of an Rb 87 atomic fountain clock. Free from additional frequency reference, the method can be applied to a running fountain to reach a precision beyond its uncertainty. A verification experiment proves an uncertainty of 9.2 × 10 16 at an averaging time of 242500 s. Further, the method is applied to measure light shift, and no visible relative frequency shift is found in the fountain within the uncertainty of 2.1 × 10 15 . When applied to the evaluation of a cold collisional shift, the result gives a 2.2 × 10 15 shift with a 9.5 × 10 16 uncertainty.
Fan Zou, Rong Wei, Richang Dong, Tingting Chen, Wenli Wang, Yuzhu Wang. Closely interleaved self-comparison method applied to precise measurement[J]. Chinese Optics Letters, 2016, 14(8): 081201.