Participation in the absolute gravity comparison with a compact cold atom gravimeter

Zhijie Fu; Qiyu Wang; Zhaoying Wang; Bin Wu; Bing Cheng; Qiang Lin

doi:doi:10.3788/COL201917.011204

Chinese Optics Letters, 2019, 17 (1): 011204, Published Online: Jan. 17, 2019

Participation in the absolute gravity comparison with a compact cold atom gravimeter Download： 840次

Zhijie Fu ^1,2Qiyu Wang ¹Zhaoying Wang ^1,*Bin Wu ²Bing Cheng ²Qiang Lin ^2,**

Author Affiliations

¹ Institute of Optics, Department of Physics, Zhejiang University, Hangzhou 310027, China

² Center for Optics and Optoelectronics Research, College of Science, Zhejiang University of Technology, Hangzhou 310023, China

Figures & Tables

Fig. 4. Tidal data measured by our CCAG. (a) is the experimental data and tidal model, where black scatters represent measured gravity value and the red line represents tidal model. (b) shows the residual between them.

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Fig. 5. Allan deviation of the residual.

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Fig. 6. Truck for the transportation of our CCAG.

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Fig. 7. Atom gravimeter runs normally in the test site. The test sites are well-isolated from vibration, and the temperature and humidity in the test room are well controlled.

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Fig. 8. The adjustment of the tilt before carrying out the absolute gravity measurement.

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Fig. 9. The comparison between our results and the given reference value.

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Table1. The Budget for the Evaluation of Measurement Uncertainty

Influence Parameters	Corrections/μGal	Uncertainties/μGal
Frequency reference	$- 82.0$	2.0
Two-photon light shift	$- 64.0$	10.0
Laser frequency reproducibility	0.0	15.0
Laser frequency bandwidth	0.0	6.0
Direction of two reversed Raman lasers	0.0	1.0
Measurement height corrections	$- 11.5$	0.1
Total uncertainty	$- 157.5$	19.0

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Zhijie Fu, Qiyu Wang, Zhaoying Wang, Bin Wu, Bing Cheng, Qiang Lin. Participation in the absolute gravity comparison with a compact cold atom gravimeter[J]. Chinese Optics Letters, 2019, 17(1): 011204.

Participation in the absolute gravity comparison with a compact cold atom gravimeter Download： 840次

Fig. 1. Schematic diagram of the gravity sensor.

Fig. 2. Picture of the CCAG in the test field.

Fig. 3. Atomic interference fringe for T= 70 ms.

Fig. 4. Tidal data measured by our CCAG. (a) is the experimental data and tidal model, where black scatters represent measured gravity value and the red line represents tidal model. (b) shows the residual between them.

Fig. 5. Allan deviation of the residual.

Fig. 6. Truck for the transportation of our CCAG.

Fig. 7. Atom gravimeter runs normally in the test site. The test sites are well-isolated from vibration, and the temperature and humidity in the test room are well controlled.

Fig. 8. The adjustment of the tilt before carrying out the absolute gravity measurement.

Fig. 9. The comparison between our results and the given reference value.

Table1. The Budget for the Evaluation of Measurement Uncertainty

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Participation in the absolute gravity comparison with a compact cold atom gravimeter Download： 840次

Fig. 1. Schematic diagram of the gravity sensor.

Fig. 2. Picture of the CCAG in the test field.

Fig. 3. Atomic interference fringe for T= 70 ms.

Fig. 4. Tidal data measured by our CCAG. (a) is the experimental data and tidal model, where black scatters represent measured gravity value and the red line represents tidal model. (b) shows the residual between them.

Fig. 5. Allan deviation of the residual.

Fig. 6. Truck for the transportation of our CCAG.

Fig. 7. Atom gravimeter runs normally in the test site. The test sites are well-isolated from vibration, and the temperature and humidity in the test room are well controlled.

Fig. 8. The adjustment of the tilt before carrying out the absolute gravity measurement.

Fig. 9. The comparison between our results and the given reference value.

Table1. The Budget for the Evaluation of Measurement Uncertainty

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