arXiv Atomic Physics
arXiv Atomic Physics
5 years ago

Vertical Gravity Profile in a 10 m Atom Interferometer. (arXiv:2003.04875v1 [physics.ins-det])

Manuel Schilling, Étienne Wodey, Ludger Timmen, Dorothee Tell, Klaus H. Zipfel, Dennis Schlippert, Christian Schubert, Ernst M. Rasel, Jürgen Müller
Absolute gravimeters are used in geodesy, geophysics, and physics for a wide spectrum of applications. Stable gravimetric measurements over timescales from several days to decades are required to provide relevant insight into geophysical processes. Instrumental accuracy is established by the comparison with a reference apparatus. However, since no reference gravimeter of higher-order accuracy currently exists, absolute gravimeters participate in group comparisons led by the International Committee for Weights and Measures. The construction of stationary, large scale atom interferometers paves the way towards new absolute gravimetry references with a potential stability better than 1 nm/s at 1 s integration time. At the Leibniz University Hannover, we are currently building such a very long baseline atom interferometer with a 10 m long interaction zone. The knowledge of local gravity and its gradient along and around the baseline is required to establish the instrument's accuracy budget and enable transfers of gravimetric measurements to nearby devices for comparison and calibration purposes. We therefore established a control network for relative gravimeters and repeatedly measured its connections during the construction of the atom interferometer. We additionally developed a 3D model of the host building and studied the impact of mass changes due to hydrology on the gravity field around the reference instrument. The adjusted model fits the results of the latest gravimetric measurement campaign with 95% confidence, opening the way for transfers of gravimetric measurements beyond the 10 nm/s level.

Publisher URL: http://arxiv.org/abs/2003.04875

DOI: arXiv:2003.04875v1

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.