Hannover 2013 – scientific programme
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A: Fachverband Atomphysik
A 28: Precision measurements and metrology III (with Q)
A 28.5: Talk
Wednesday, March 20, 2013, 15:15–15:30, E 001
Gravity measurements with the mobile atom-interferometer GAIN — •Matthias Hauth, Christian Freier, Vladimir Schkolnik, Alexander Senger, Malte Schmidt, and Achim Peters — Humboldt-Universität zu Berlin, Institut für Physik, AG Optische Metrologie, Newtonstr. 15, 12489 Berlin
The Gravimetric Atom Interferometer (GAIN) uses ensembles of laser cooled 87Rb atoms to determine the gravitational acceleration with a targeted accuracy of a few parts in 1010g. The atoms interfere in a Mach-Zehnder type interferometer realized by means of Raman transitions between the hyperfine ground states.
Here we introduce our experimental setup and different sub-systems, which allow for characterization and reduction of systematic effects like e.g. the Coriolis effect of the Earth, vibrational noise and µ−radian tilts of the experiment.
We also present our latest measurement campaigns, where we have reached a sensitivity of 3 · 10−8g/√Hz, compare them to data taken with classical gravimeters and give an outlook to future improvements and measurement campaigns.