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Performance Analysis of Space Cold Atomic Clock Based on In-Situ Atomic Detection

彭向凯 Peng Xiangkai, 任伟 Ren Wei, 项静峰 Xiang Jingfeng +3 more

Acta Optica SinicaJan 1, 20191 citation

Design of the cold atom PHARAO space clock and initial test results

Philippe Laurent, Michel Abgrall, Ch. Jentsch +17 more

Applied Physics BAug 30, 2006108 citations

New design of the compact cold atoms clock HORACE

François-Xavier Esnault, Sean Perrin, S. Trémine +5 more

In the compact cold atoms clock HORACE caesium atoms are successively laser cooled, submitted to a Ramsey microwave interrogation scheme and then detected by linear absorption directly inside the microwave cavity. The whole physics package and optical bench have been entirely redesigned to optimize such an in-situ detection and to perform a normalization scheme. Main efforts have been concentrated on technical issues such as magnetic shielding, microwave cavity polishing and tuning, use of fast mechanical switches to realize the optical sequence.In the compact cold atoms clock HORACE caesium atoms are successively laser cooled, submitted to a Ramsey microwave interrogation scheme and then detected by linear absorption directly inside the microwave cavity. The whole physics package and optical bench have been entirely redesigned to optimize such an in-situ detection and to perform a normalization scheme. Main efforts have been concentrated on technical issues such as magnetic shielding, microwave cavity polishing and tuning, use of fast mechanical switches to realize the optical sequence.

Jan 1, 20066 citations

ATOMS COOLED IN A MICROWAVE CAVITY FOR MINIATURIZED CLOCK

Paul-Éric Pottie, T. Zanon-Willette, P. Petit +3 more

Symposium on Frequency Standards and MetrologyMay 1, 20020 citations

Cold atom microwave clock based on intracavity cooling in China space station

Siminda Deng, Wei Ren, Jingfeng Xiang +9 more

Abstract Atomic clocks with higher frequency stability and accuracy than traditional space-borne atomic clocks are the cornerstone of long-term autonomous operation of space-time-frequency systems. We proposed a space cold atoms clock based on an intracavity cooling scheme, which captures cold atoms at the center of a microwave cavity and then executes in situ interactions between the cold atoms and microwaves. As a result of the microgravity environment in space, the cold atoms can interact with the microwaves for a longer time, which aids in realizing a high-precision atomic clock in space. This paper presents the overall design, operational characteristics, and reliability test results of the space atomic clock based on the intracavity cooling scheme designed for the operation onboard the China space station. In addition, the engineering prototype performance of the space cold atoms microwave clock is also presented. The ground test results for the clock show a fractional frequency stability of 1.1 × 10−12 τ−1/2 reaching 2.5 × 10−15 at 200,000 s, providing solid technical and data support for its future operation in orbit.Abstract Atomic clocks with higher frequency stability and accuracy than traditional space-borne atomic clocks are the cornerstone of long-term autonomous operation of space-time-frequency systems. We proposed a space cold atoms clock based on an intracavity cooling scheme, which captures cold atoms at the center of a microwave cavity and then executes in situ interactions between the cold atoms and microwaves. As a result of the microgravity environment in space, the cold atoms can interact with the microwaves for a longer time, which aids in realizing a high-precision atomic clock in space. This paper presents the overall design, operational characteristics, and reliability test results of the space atomic clock based on the intracavity cooling scheme designed for the operation onboard the China space station. In addition, the engineering prototype performance of the space cold atoms microwave clock is also presented. The ground test results for the clock show a fractional frequency stability of 1.1 × 10−12 τ−1/2 reaching 2.5 × 10−15 at 200,000 s, providing solid technical and data support for its future operation in orbit.

npj MicrogravityJun 6, 20249 citations

Development of a compact cold atom clock with a cylindrical cavity

Liang Liu, Hua-Dong Cheng, Peng Liu +5 more

Bulletin of the American Physical SocietyJun 9, 20150 citations

Design of Microwave Cavity for in Situ Atom Detection Used in Space Cold Atom Clock

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