Physics package based on intracavity laser cooling 87Rb atoms for space cold atom microwave clock

doi:10.1088/1674-1056/ad4bc1

Abstract This article proposes a new physics package to enhance the frequency stability of the space cold atom clock with the advantages of a microgravity environment. Clock working processes, including atom cooling, atomic state preparation, microwave interrogation, and transition probability detection, are integrated into the cylindrical microwave cavity to achieve a high-performance and compact physics package for the space cold atom clock. We present the detailed design and ground-test results of the cold atom clock physics package in this article, which demonstrates a frequency stability of $1.2 \times 10^{-12}$ $\tau^{-1/2}$ with a Ramsey linewidth of 12.5 Hz, and a better performance is predicted with a 1 Hz or a narrower Ramsey linewidth in microgravity environment. The miniaturized cold atom clock based on intracavity cooling has great potential for achieving space high-precision time-frequency reference in the future.

Keywords: atomic clock microgravity microwave cavity space station frequency stability

Received: 18 April 2024
Revised: 06 May 2024
Accepted manuscript online: 15 May 2024

PACS:	06.30.Ft	(Time and frequency)
	91.10.Fc	(Space and satellite geodesy; applications of global positioning systems)
	43.58.Hp	(Tuning forks, frequency standards; frequency measuring and recording instruments; time standards and chronographs)
	95.55.Sh	(Auxiliary and recording instruments; clocks and frequency standards)

Fund: Project supported by the Space Application System of China Manned Space Program and the Youth Innovation Promotion Association, CAS.

Corresponding Authors: Wei Ren, Desheng Lu
E-mail: renweimiao87@siom.ac.cn;dslv@siom.ac.cn

Cite this article:

Siminda Deng(邓思敏达), Wei Ren(任伟), Jingfeng Xiang(项静峰), Jianbo Zhao(赵剑波), Lin Li(李琳), Di Zhang(张迪), Jinyin Wan(万金银), Yanling Meng(孟艳玲), Xiaojun Jiang(蒋小军), Tang Li(李唐), Liang Liu(刘亮), and Desheng Lü(吕德胜) Physics package based on intracavity laser cooling ⁸⁷Rb atoms for space cold atom microwave clock 2024 Chin. Phys. B 33 070602

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Physics package based on intracavity laser cooling 87Rb atoms for space cold atom microwave clock

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Physics package based on intracavity laser cooling ⁸⁷Rb atoms for space cold atom microwave clock