Stability comparison of two absolute gravimeters: optical versus atomic interferometers

Abstract

We report the direct comparison between the stabilities of two mobile absolute gravimeters of different technology: the LNE-SYRTE Cold Atom Gravimeter and FG5X\#216 of the Université du Luxembourg. These instruments rely on two different principles of operation: atomic and optical interferometry. The comparison took place in the Walferdange Underground Laboratory for Geodynamics in Luxembourg, at the beginning of the last International Comparison of Absolute Gravimeters, ICAG-2013. We analyse a 2h10 duration common measurement, and find that the CAG shows better immunity with respect to changes in the level of vibration noise, as well as a slightly better short term stability.

arXiv comment6 pages

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• Limits to the sensitivity of a low noise compact atomic gravimeter
• Compact cold atom gravimeter for field applications
• A cold atom pyramidal gravimeter with a single laser beam
• Comparison between two mobile absolute gravimeters: optical versus atomic interferometers
• Operating an atom interferometer beyond its linear range

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