中国物理B ›› 2016, Vol. 25 ›› Issue (12): 120601-120601.doi: 10.1088/1674-1056/25/12/120601

• GENERAL • 上一篇    下一篇

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

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)   

  1. 1. Key Laboratory of Atomic Frequency Standards(KLAFS), Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    3. University of the Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2016-06-08 修回日期:2016-07-18 出版日期:2016-12-05 发布日期:2016-12-05
  • 通讯作者: Lei She, Jiao-Mei Li E-mail:shelei@wipm.ac.cn;jmlee@wipm.ac.cn
  • 基金资助:

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

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

Yi-He Chen(陈义和)1,2,3, Lei She(佘磊)1,2,3, Man Wang(汪漫)1,2,3, Zhi-Hui Yang(杨智慧)1,2,3, Hao Liu(柳浩)1,2,3, Jiao-Mei Li(李交美)1,2,3   

  1. 1. Key Laboratory of Atomic Frequency Standards(KLAFS), Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    3. University of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-06-08 Revised:2016-07-18 Online:2016-12-05 Published:2016-12-05
  • Contact: Lei She, Jiao-Mei Li E-mail:shelei@wipm.ac.cn;jmlee@wipm.ac.cn
  • Supported by:

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

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摘要：

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.

关键词: Dick effect, 199Hg+ trapped-ion clock, Allan deviation

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.

Key words: Dick effect, 199Hg+ trapped-ion clock, Allan deviation

中图分类号:  (Time and frequency)

  • 06.30.Ft
06.20.Dk (Measurement and error theory) 37.10.Ty (Ion trapping)