Dependence of the sensitivity on the orientation for a free-fall atom gravimeter.

Authors:
Bin Wu
Bin Wu
Ren Ji Hospital
China
Dong Zhu
Dong Zhu
School of Pharmacy
China
Bing Cheng
Bing Cheng
Zhongshan Ophthalmic Center
Liming Wu
Liming Wu
Bee Research Institute
China
Kainan Wang
Kainan Wang
The State University of New Jersey Newark
Newark | United States
Zhaoying Wang
Zhaoying Wang
Zhejiang University
China
Qing Shu
Qing Shu
School of Metallurgy and Chemical Engineering
China
Rui Li
Rui Li
Key Laboratory of Animal Immunology of the Ministry of Agriculture
China

Opt Express 2019 Apr;27(8):11252-11263

The cold atom absolute gravimeters are intrinsically sensitive to its orientation due to the Coriolis effect, which should be understood clearly and compensated for field applications. The sensitivity on the orientation for a free-fall atom gravimeter is investigated in this paper. The apparatus is simplified and improved a lot such that fast adjustment and measurement could be carried out within 20 minutes. From the experimental results, it is found that the orientation angle has a dominant influence on the absolute gravity measurement, especially when the horizontal velocity of atoms is non-negligible. Besides, the magnitude and direction of average horizontal velocity of the detected atoms are obtained in this experiment. In particular, the direction of East-West has been measured by the atom gravimeter itself, such that gravity bias arising from Coriolis effect is estimated precisely.

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http://dx.doi.org/10.1364/OE.27.011252DOI Listing
April 2019
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