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Status of gravimetric measurements and modelling along a 10m atom interferometer

Schilling, Manuel and Wodey, Étienne and Timmen, Ludger and Tell, Dorothee and Zipfel, Klaus and Schubert, Christian and Rasel, Ernst and Müller, Jürgen (2021) Status of gravimetric measurements and modelling along a 10m atom interferometer. Scientific Assembly of the International Association of Geodesy, 28. Jun. - 02. Jul. 2021, Beijing, Online.

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Abstract

Transportable quantum sensors become more common especially in gravimetry and measurements on longer timescales or field campaigns are carried out. Large scale atom interferometers are much rarer and mostly used for experiments in fundamental physics but can also be operated as gravimeter. The extended free fall time of atoms compared to transportable devices paves the way towards a new measurement standard in absolute gravimetry with a potential stability of better than 1 nm/s² at 1 second integration time. In contrast, the reference values at gravimetric key comparisons, which provide the highest accuracy today, achieve an accuracy of 10 nm/s². At the Leibniz University Hannover, we are currently building a very long baseline atom interferometer (VLBAI) with a 10 m vertical free fall zone. The impact of the instrument on the local gravity field and vice versa was determined by gravimetric measurements during the construction. A 3D model of the VLBAI and its environment was created to calculate the gravitational effect of the masses on experiments of the atom interferometer. The model is then compared to episodic gravimetric measurements. The knowledge of local gravity and its gradient is required to establish the instrument´s uncertainty budget and enable the transfer of gravimetric measurements to nearby devices for comparison. We report on the progress of the gravimetric measurements and modelling in parallel to the construction of the VLBAI.

Item URL in elib:https://elib.dlr.de/147788/
Document Type:Conference or Workshop Item (Poster)
Title:Status of gravimetric measurements and modelling along a 10m atom interferometer
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schilling, ManuelManuel.Schilling (at) dlr.dehttps://orcid.org/0000-0002-9677-0119
Wodey, ÉtienneInstitut für Quantenoptik, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0001-9522-8558
Timmen, LudgerInstitut für Erdmessung, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0003-2334-5282
Tell, DorotheeInstitut für Quantenoptik, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0002-2793-7982
Zipfel, KlausInstitut für Quantenoptik, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0002-3135-1247
Schubert, ChristianChristian.Schubert (at) dlr.deUNSPECIFIED
Rasel, ErnstInstitut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, GermanyUNSPECIFIED
Müller, JürgenInstitut für Erdmessung, Leibniz Universität Hannover, Germanyhttps://orcid.org/0000-0003-1247-9525
Date:2021
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:atom interferometer, gravimetry, 3D modelling
Event Title:Scientific Assembly of the International Association of Geodesy
Event Location:Beijing, Online
Event Type:international Conference
Event Dates:28. Jun. - 02. Jul. 2021
Organizer:International Association of Geodesy
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - Inertial Sensing for Space Applications
Location: Hannover
Institutes and Institutions:Institute for Satellite Geodesy and Inertial Sensing > Satellite Geodesy and Geodetic Modelling
Institute for Satellite Geodesy and Inertial Sensing > Quantum Sensing
Deposited By: Schilling, Manuel
Deposited On:10 Jan 2022 08:29
Last Modified:10 Jan 2022 08:29

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