Evaluation of the frequency instability limited by Dick effect in the microwave 199Hg+ trapped-ion clock

doi:10.1088/1674-1056/25/12/120601

Abstract

In the microwave ¹⁹⁹Hg⁺ trapped-ion clock, the frequency instability degradation caused by the Dick effect is unavoidable because of the periodical interrogating field. In this paper, the general expression of the sensitivity function g(t) to the frequency fluctuation of the interrogating field with Nπ-pulse (N is odd) is derived. According to the measured phase noise of the 40.5-GHz microwave synthesizer, the Dick-effect limited Allan deviation of our ¹⁹⁹Hg⁺ trapped-ion clock is worked out. The results indicate that the limited Allan deviations are about 1.75×10^-13/√τ and 3.03×10^-13/√τ respectively in the linear ion trap and in the two-segment extended linear ion trap under our present experimental parameters.

Keywords: Dick effect ¹⁹⁹Hg⁺ trapped-ion clock Allan deviation

Received: 08 June 2016
Revised: 18 July 2016
Accepted manuscript online:

PACS:	06.30.Ft	(Time and frequency)
	06.20.Dk	(Measurement and error theory)
	37.10.Ty	(Ion trapping)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11074248 and 11474320).

Corresponding Authors: Lei She, Jiao-Mei Li
E-mail: shelei@wipm.ac.cn;jmlee@wipm.ac.cn

Cite this article:

Yi-He Chen(陈义和), Lei She(佘磊), Man Wang(汪漫), Zhi-Hui Yang(杨智慧), Hao Liu(柳浩), Jiao-Mei Li(李交美) Evaluation of the frequency instability limited by Dick effect in the microwave ¹⁹⁹Hg⁺ trapped-ion clock 2016 Chin. Phys. B 25 120601

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Evaluation of the frequency instability limited by Dick effect in the microwave 199Hg+ trapped-ion clock

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Evaluation of the frequency instability limited by Dick effect in the microwave ¹⁹⁹Hg⁺ trapped-ion clock