Research on generating a local time scale with NIM-Sr1 optical lattice clock

被引：0
|
作者：
Zhu L. [1 ,2 ,3 ]
Wang Q. [1 ,2 ]
Wang Y. [1 ,2 ]
Lin Y. [1 ,2 ]
Fang Z. [1 ,2 ]
机构：
[1] Division of Time and Frequency Metrology, National Institute of Metrology, Beijing
[2] Key Laboratory of State Administration for Market Regulation (Time Frequency and Gravity Primary Standard), Beijing
[3] Department of Precision Instrument, Tsinghua University, Beijing
来源：
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2024年 / 45卷 / 02期
关键词：
hydrogen maser; optical clock; steering; time scale;
D O I：
10.19650/j.cnki.cjsi.J2311982
中图分类号：
学科分类号：
摘要：
Optical clocks have great potential to generatie high-performance atomic time scales. This paper introduces the basic idea of generating a local time scale steered to NIM-Sr1 optical lattice clock of the National Institute of Metrology (NIM), and the evaluation of the noise parameters of the HM57 hydrogen maser which is currently used as the flywheel oscillator. When NIM-Sr1 is operated as a reference clock, it runs consecutively with interrupts. A post-processing steering algorithm is designed to match this operation condition with the comparison data between NIM-Sr1 and HM57 in September and October 2022. The post-processing time scale TS(P) steered to NIM-Sr1 has a maximum time deviation of 0. 7 ns compared with TT(BIPM22) within 60 days. Moreover, a system with dedicated hardware and software is built to generate a real-time physical time scale by steering HM57 to NIM-Sr1. The generated real-time physical time scale TS(R) in April 2023 is evaluated with a maximum time deviation of 0. 89 ns compared with UTC within 30 days. © 2024 Science Press. All rights reserved.
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页码：137 / 144
页数：7
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