Uncertainty Evaluation of the Caesium Fountain Primary Frequency Standard NIM6
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866912123107409920 |
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| author | Zheng, Fasong Chen, Weiliang Liu, Kun Dai, Shaoyang Liu, Nianfeng Wang, Yuzhuo Fang, Fang |
| author_facet | Zheng, Fasong Chen, Weiliang Liu, Kun Dai, Shaoyang Liu, Nianfeng Wang, Yuzhuo Fang, Fang |
| contents | A new caesium (Cs) fountain clock NIM6 has been developed at the National Institute of Metrology (NIM) in China, for which a comprehensive uncertainty evaluation is presented. A three-dimensional magneto-optical trap (3D MOT) loading optical molasses is employed to obtain more cold atoms rapidly and efficiently with a tunable, uniform density distribution. A heat pipe surrounding the flight tube maintains a consistent and stable temperature within the interrogation region. Additionally, a Ramsey cavity with four azimuthally distribution feeds is utilized to mitigate distributed cavity phase shifts. The Cs fountain clock NIM6 achieves a short-term stability of 1.0x10-13 τ-1/2 at high atomic density, and a typical overall fractional type-B uncertainty is estimated to be 2.3x10-16. Comparisons of frequency between the Cs fountain NIM6 and other Cs fountain Primary Frequency Standards (PFSs) through Coordinated Universal Time (UTC) have demonstrated an agreement within the stated uncertainties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_11349 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Uncertainty Evaluation of the Caesium Fountain Primary Frequency Standard NIM6 Zheng, Fasong Chen, Weiliang Liu, Kun Dai, Shaoyang Liu, Nianfeng Wang, Yuzhuo Fang, Fang Quantum Physics Atomic Physics A new caesium (Cs) fountain clock NIM6 has been developed at the National Institute of Metrology (NIM) in China, for which a comprehensive uncertainty evaluation is presented. A three-dimensional magneto-optical trap (3D MOT) loading optical molasses is employed to obtain more cold atoms rapidly and efficiently with a tunable, uniform density distribution. A heat pipe surrounding the flight tube maintains a consistent and stable temperature within the interrogation region. Additionally, a Ramsey cavity with four azimuthally distribution feeds is utilized to mitigate distributed cavity phase shifts. The Cs fountain clock NIM6 achieves a short-term stability of 1.0x10-13 τ-1/2 at high atomic density, and a typical overall fractional type-B uncertainty is estimated to be 2.3x10-16. Comparisons of frequency between the Cs fountain NIM6 and other Cs fountain Primary Frequency Standards (PFSs) through Coordinated Universal Time (UTC) have demonstrated an agreement within the stated uncertainties. |
| title | Uncertainty Evaluation of the Caesium Fountain Primary Frequency Standard NIM6 |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2411.11349 |