Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Vibration Compensation for a Vehicle-mounted Atom Gravimeter

Version 1 : Received: 10 November 2021 / Approved: 15 November 2021 / Online: 15 November 2021 (11:34:46 CET)

How to cite: Guo, J.; Ma, S.; Zhou, C.; Liu, J.; Wang, B.; Pan, D.; Mao, A.H. Vibration Compensation for a Vehicle-mounted Atom Gravimeter. Preprints 2021, 2021110255 (doi: 10.20944/preprints202111.0255.v1). Guo, J.; Ma, S.; Zhou, C.; Liu, J.; Wang, B.; Pan, D.; Mao, A.H. Vibration Compensation for a Vehicle-mounted Atom Gravimeter. Preprints 2021, 2021110255 (doi: 10.20944/preprints202111.0255.v1).

Abstract

The performance of the absolute atom gravimeters used on moving platforms, such as vehicles, ships and aircrafts, is strongly affected by the vibration noise. To suppress its influence, we summarize a vibration compensation method utilizing data measured by a classical accelerometer. The measurements with the accelerometer show that the vibration noise in the vehicle can be 2 order of magnitude greater than that in the lab during daytime, and can induce an interferometric phase fluctuation with a standard deviation of 16.70π. With the compensation method, our vehicle-mounted atom gravimeter can work normally in these harsh conditions. Comparing the Allan standard deviations before and after the vibration noise correction, we find a suppression factor of 22.74 can be achieved in static condition with an interrogation time of T = 20 ms, resulting a sensitivity of 1.35 mGal/Hz1/2, and a standard deviation of 0.5 mGal with an average time of 10 s. We also demonstrate the first test of an atom gravimeter in a moving vehicle, in which a suppression factor of 50.85 and a sensitivity of 60.88 mGal/Hz1/2 were realized with T = 5 ms.

Keywords

atom gravimeter; vibration compensation; vehicle-mounted

Subject

PHYSICAL SCIENCES, Atomic & Molecular Physics

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