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Tilt adjustment for a portable absolute atomic gravimeter

Chinese Physics B 2020年第7期29卷 295-299页

作者： Hong-Tai Xie Bin Chen Jin-Bao Long Chun Xue Luo-Kan Chen Shuai Chen Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Shanghai Branch CAS Center for Excellence in Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaShanghai 201315China Shanghai Research Center for Quantum Sciences Shanghai 201315China Shanghai Division QuantumCTek Co.Ltd.Shanghai 201315China

For an atomic gravimeter,the measured value of the Earth’s gravity acceleration g is the projection of the local gravity on the direction of Raman laser *** accurately measure the g,the Raman laser beams should be parallel to the g *** analyze the tilt effect of the Raman beams on g measurement and present a general method for the tilt *** systematic error caused by the tilt angle is evaluated as 0(+0,0.8)µGal(1µGal=10 nm/s^2)and the drift is also compensated in real *** method is especially suitable for the portable atomic gravimeter which focuses on the mobility and field applications.

关键词： atomic gravimeter systematic error tilt adjustment stability

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维普期刊数据库

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Portable atomic gravimeter operating in noisy urban environments

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Chinese Optics Letters 2020年第9期18卷 8-13页

作者： Bin Chen Jinbao Long Hongtai Xie Chenyang Li Luokan Chen Bonan Jiang Shuai Chen Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Shanghai Branch CAS Center for Excellence in Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaShanghai 201315China Shanghai Research Center for Quantum Sciences Shanghai 201315China

The gravimeter based on atom interferometry has potential wide applications on building gravity networks and geophysics as well as gravity assisted navigation. Here, we demonstrate experimentally a portable atomic gravimeter operating in the noisy urban environment. Despite the influence of noisy external vibrations, our portable atomic gravimeter reaches a sensitivity as good as 65 μGal/√Hz and a resolution of 1.1 μGal after 4000 s integration, being comparable to state-of-the-art atomic gravimeters. Our achievement paves the way for bringing the portable atomic gravimeter to field applications.

关键词： atomic gravimeter noisy environment

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维普期刊数据库

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Michelson laser interferometer-based vibration noise contribution measurement method for cold atom interferometry gravimeter

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Chinese Physics B 2020年第7期29卷 85-91页

作者： Ning Zhang Qingqing Hu Qian Wang Qingchen Ji Weijing Zhao Rong Wei Yuzhu Wang Key Laboratory for Quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Advanced Interdisciplinary Technology Research Center National Innovation Institute of Defense TechnologyBeijing 100010China Department of Physics Shanghai UniversityShanghai 201800China

The measurement performance of the atom interferometry absolute gravimeter is strongly affected by the ground vibration *** propose a vibration noise evaluation scheme using a Michelson laser interferometer constructed by the intrinsic Raman laser of the atomic *** analysis shows that the vibration phase measurement accuracy is better than 4 mrad,which corresponds to about 10-^10 g accuracy for a single shot gravity *** with the commercial seismometer or accelerometer,this method is a simple,low cost,direct,and fully synchronized measurement of the vibration phase which should benefit the development of the atomic *** the other side,limited by equivalence principle,the result of the laser interferometer is not absolute but relative vibration *** cap method could be used to evaluation the noise contribution of vibration,which is a different method from others and should benefit the development of the atomic gravimeter.

关键词： atomic gravimeter Raman laser vibration monitoring

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