Compact Active Vibration Isolation and Tilt Stabilization for a Portable High-Precision Atomic Gravimeter

被引：7
作者：
Oon F.E. [1 ]
Dumke R. [1 ,2 ]
机构：
[1] Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore
[2] Division of Physics and Applied Physics, Nanyang Technological University, 21 Nanyang Link, Singapore
来源：
Physical Review Applied | 2022年 / 18卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
Adaptive control systems - Atoms - Feedback control - Ground state - Horizontal wells - Laser beams - Stabilization;
D O I：
10.1103/PhysRevApplied.18.044037
中图分类号：
学科分类号：
摘要：
In high-precision atomic gravimeters, a rest mass is needed to provide a gravity reference, which is typically the retro-reflecting mirror of the Raman laser beams that address the two hyperfine ground states of the specific free-falling atomic test mass. We construct a compact active feedback control system for the retro-reflecting mirror that provides vibration isolation in the vertical axis as well as two-rotation stabilization in the horizontal plane. The active feedback control provides vertical vibration reduction of up to a factor of 300 in the frequency range of 0.03 to 10 Hz and tilt stabilization of approximately ±1μrad in a noisy laboratory environment. This system enables high-precision gravity measurements on a portable gravimeter with sensitivity reaching 6.4×10-8g/Hz and resolution of 2.8×10-9g after an integration time of 4000 s. © 2022 American Physical Society.
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