| Improved Evaluation of BBR and Collisional Frequency Shifts of NIM-Sr2 with 7.2 × 10-18 Total Uncertainty |
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| 作者姓名： | 卢炳坤 孙震 杨涛 林弋戈 王强 李烨 孟飞 林百科 李天初 方占军 |
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| 作者单位： | 1. Division of Time and Frequency Metrology National Institute of Metrology;2. Department of Precision Instrument Tsinghua University |
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| 基金项目： | supported by the National Key R&D Program of China (Grant Nos. 2021YFF0603802 and 2016YFF0200201)； |
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| 摘 要： | NIM-Sr2 optical lattice clock has been developed on the Changping campus of National Institute of Metrology(NIM). Considering the limitations in NIM-Sr1, several improved parts have been designed including a differential pumping stage in the vacuum system, a permanent magnet Zeeman slower, water-cooled anti-Helmholtz coils,an extended viewport for Zeeman slower, etc. A clock laser with a short-time stability better than 3 × 10-16 is realized based on a self-designed 30-cm-long ultra-l...
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