A Gravimetric Support Network for Very Long Baseline Atom Interferometry

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dc.identifier.uri http://dx.doi.org/10.15488/8241
dc.identifier.uri https://www.repo.uni-hannover.de/handle/123456789/8294
dc.contributor.author Schilling, Manuel ger
dc.contributor.author Wodey, Étienne ger
dc.contributor.author Timmen, Ludger ger
dc.contributor.author Tell, Dorothee ger
dc.contributor.author Zipfel, Klaus ger
dc.contributor.author Rasel, Ernst Maria ger
dc.contributor.author Müller, Jürgen ger
dc.date.accessioned 2019-12-04T10:47:30Z
dc.date.available 2019-12-11T23:05:02Z
dc.date.issued 2019
dc.identifier.citation Schilling, M. et al.: A Gravimetric Support Network for Very Long Baseline Atom Interferometry. Poster, AGU Fall Meeting, 9-13 Dezember 2019, San Francisco, USA ger
dc.description.abstract With the introduction of portable atom interferometers (AI), a genuinely independent method for the determination of g is available for the first time since the introduction of laser interferometer based instruments. Current AIs offer several advantages and already reach the accuracy of classical sensors. Additionally, a small number of stationary experiments were implemented for research in fundamental physics and geodesy. These instruments, extending the free fall distance of atoms to several meters, allow for longer evolution times of the wave function, thereby increasing the sensitivity of the AI compared to decimetres in portable devices. The construction of an AI with a 9 m interaction zone is currently being completed at Leibniz University Hannover. The knowledge of g and its gradient is required for the evaluation of systematic effects and uncertainties in AI experiments. Therefore, a gravimetric control network connected to one absolute gravimeter pier was established and repeatedly observed during the construction of the Very Long Baseline Atom Interferometry facility (VLBAI). Before the installation of the instrument, this network included the central axis of the VLBAI and one vertical off-axis parallel profile. The latter profile can also be observed during operation of the VLBAI. The effect of local gravity changes, e. g., hydrology, is comparable to 1 nm/s² on both axes. The gravimetric measurements serve as a reference during initial tests of the VLBAI. Repeated observations in the future will be used to characterize the effect of local hydrology and other mass variations along the vertical axis. A model of the research building and groundwater level monitoring supplements the gravimetric network. As the VLBAI is capable of measuring g and its vertical gradient with higher accuracy (<1 nm/s²) than classical instruments, the model will be used to transfer g to a gravimetry laboratory for gravimeter comparisons. We present our strategy for gravimetric control of the VLBAI. This will provide a reference at first and will later be used to establish the VLBAI as a reference for gravimeter comparisons. The results of the first gravimetric campaigns and the comparison with the model of the VLBAI environment show an agreement within the instrumental uncertainties of the relative gravimeters used. ger
dc.language.iso eng ger
dc.publisher Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
dc.rights CC BY 3.0 DE ger
dc.rights.uri http://creativecommons.org/licenses/by/3.0/de/ ger
dc.subject Gravimetry eng
dc.subject atom interferometry eng
dc.subject VLBAI eng
dc.subject Gravimetrie ger
dc.subject Atominterferometrie ger
dc.subject VLBAI ger
dc.subject.ddc 550 | Geowissenschaften ger
dc.subject.ddc 530 | Physik ger
dc.title A Gravimetric Support Network for Very Long Baseline Atom Interferometry eng
dc.type conferenceObject ger
dc.type Text ger
dc.description.version publishedVersion ger
tib.accessRights frei zug�nglich

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