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基于中国空间站内空洞冷却的冷原子微波时钟
Siminda Deng1,2,3, Wei Ren4,5, Jingfeng Xiang1
1Aerospace Laser Technology and Systems Department, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China.
NPJ microgravity
|June 6, 2024
概括
一个新的太空冷原子钟利用洞内冷却来提高微重力中的性能. 这种原子钟实现了非凡的频率稳定性,为先进的时空频率系统铺平了道路.
科学领域:
- 原子,分子和光学物理学
- 太空科学与技术 太空科学与技术
- 计量学 计量学 计量学
背景情况:
- 高精度原子钟对于自主时空频率系统至关重要.
- 现有的太空原子钟在频率稳定性和准确性方面存在局限性.
- 为了长期,可靠的太空作业,需要取得进展.
研究的目的:
- 设计和测试一个新的太空冷原子钟,使用一个洞内冷却方案.
- 为了评估时钟的性能特征和空间站部署的可靠性.
- 为了证明在微重力环境中高精度原子钟的可行性.
主要方法:
- 太空冷原子钟的开发,采用内腔冷却技术.
- 冷原子与共振腔内的微波在现场相互作用.
- 测试和分析时钟的操作特性和工程原型性能.
主要成果:
- 太空冷原子钟实现了1.1 × 10-12 τ-1/2 的分数频率稳定性.
- 在20万秒内达到2.5 × 10-15的长期稳定性.
- 该设计为未来的轨道作业提供了强大的技术和数据支持.
结论:
- 内腔冷却方案使原子钟在太空中的性能提高.
- 开发的时钟符合在中国空间站运行的严格要求.
- 这项技术支持自主时空频率系统的发展.
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