A Transportable Atomic Gravimeter with Constraint-Structured Active Vibration Isolation

Author:

Ruan Chuanjing12,Zhuang Wei13,Yao Jiamin13,Zhao Yang13,Ma Zenghan14,Yi Cong1,Tian Qin12,Wu Shuqing13,Fang Fang13,Wen Yinghong2

Affiliation:

1. National Institute of Metrology, Beijing 100029, China

2. School of Automation and Intelligence, Beijing Jiaotong University, Beijing 100044, China

3. Key Laboratory of State Administration for Market Regulation (Time Frequency and Gravity Primary Standard), Beijing 100029, China

4. College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China

Abstract

Many efforts have been taken in recent years to push atomic gravimeters toward practical applications. We demonstrate an atomic gravimeter named NIM-AGRb2 that is transportable and suitable for high-precision gravity measurements. Constraint-structured active vibration isolation (CS-AVI) is used to reduce the ground vibration noise. The constraint structure in CS-AVI ensures that the isolation platform only has vertical translation, with all other degrees of freedom (DoFs) being constrained. Therefore, the stability of active vibration isolation is enhanced. With the implementation of CS-AVI, the sensitivity of NIM-AGRb2 reached as low as 20.5 μGal/Hz1/2. The short-term sensitivity could be further reduced to 10.8 μGal/Hz1/2 in a seismologic observation station. Moreover, we evaluated the system noise of the gravimeter, and the results were consistent with our observations.

Funder

National Key Research and Development Program of China

Publisher

MDPI AG

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Classical and Atomic Gravimetry;Remote Sensing;2024-07-18

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