Development of cesium fountain clock as local precision time and frequency standard

被引：0
|
作者：
Li H. [1 ]
Du Y. [2 ]
Liu H. [1 ]
Lu Z. [1 ]
机构：
[1] MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF, School of Physics, Huazhong University of Science and Technology, Wuhan
[2] MOE Key Laboratory of TianQin Mission, TianQin Research Center for Gravitational Physics, Frontiers Science Center for TianQin, CNSA Research Center for Gravitational Waves, Sun Yat-sen University, Zhuhai Campus, Guangdong, Zhuhai
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2022年 / 50卷 / 09期
关键词：
Cesium fountain clock; frequency stability; hydrogen maser; Ramsey fringes; time-frequency tracing device;
D O I：
10.13245/j.hust.220904
中图分类号：
学科分类号：
摘要：
The development of a cesium fountain clock system to serve as the local time and frequency standard for the National Precise Gravity Measurement Facility was discussed. The design and construction of the entire fountain clock system was described, including the physical system, the optical system, the microwave frequency synthesizer, and the electronics control system. Experimentally, the cesium atoms are successfully launched and captured, and Ramsey fringes are obtained. The central Ramsey fringe has linewidth of 0.911(2) Hz, with a contrast of 90.8%. By locking the local oscillator to the central Ramsey fringe, and comparing with a hydrogen maser, a frequency stability of 3.2×10-13τ-1/2 (τ is the measurement time) has been achieved. The limiting factors of the frequency stability are also discussed with suggestions for further improvements. In addition, major uncertainty contributions are also being evaluated. © 2022 Huazhong University of Science and Technology. All rights reserved.
引用
收藏
页码：23 / 29
页数：6
相关论文
共 36 条
  • [31] XU C, XU R, ZENG W, Et al., A new high-precision gravity solid tidal model for Precision Gravity Measurement Facility, Geodesy and Geodynamics, 11, 4, pp. 265-272, (2020)
  • [32] WEYERS S, GERGINOV V, KAZDA M, Et al., Advances in the accuracy, stability, and reliability of the PTB primary fountain clocks, Metrologia, 55, 6, pp. 789-805, (2018)
  • [33] LI W B, DU Y B, LI H, Et al., Development of low phase noise microwave frequency synthesizers for reducing Dick effect of Cs fountain clocks, AIP Advances, 8, 9, (2018)
  • [34] (2021)
  • [35] NAKAMURA T, DAVILA-RODRIGUEZ J, LEOPAR-DI H, Et al., Coherent optical clock down-conversion for microwave frequencies with 10<sup>-18</sup> instability, Science, 368, 6493, pp. 889-892, (2020)
  • [36] MANN A G, SHENG C, LUITEN A N., Cryogenic sapphire oscillator with exceptionally high frequency stability, IEEE Transactions on Instrumentation and Measurement, 50, 2, pp. 519-521, (2001)
1234