Gravity data acquisition and validation of the interferometric meaurement concept with the transportable absolute Quantum Gravimeter QG-1
- 1Institut für Satellitengeodäsie und Inertialsensorik, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Hannover, Germany
- 2Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germany
- 3Institut für Erdmessung, Leibniz Universität Hannover, Hannover, Germany
The transportable Quantum Gravimeter QG-1 derives the local gravity value from the interferometric signal of magnetically collimated Bose-Einstein condensates (BECs) released into free-fall and detected by absorption imaging. The objective of the device is to determine the local gravity value with an uncertainty < 3 nm/s2. The projected gain in accuracy in contrast to cold atoms is facilitated by the minimised initial velocity and expansion rate of the BEC.
In this contribution we describe our transportable setup, the status of implementation of first interferometric studies and give an evaluation of preliminary gravity data recorded with the Quantum Gravimeter QG-1, showing the operability of key functionalities of the device and the validity of
the concept. We indicate next steps to increase the instrument’s sensitivity and to verify the measurement’s level of uncertainty.
The research is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy – EXC-2123
QuantumFrontiers – 390837967 and under Project-ID 434617780 – SFB 1464 TerraQ - Relativistic and Quantum-based Geodesy.
How to cite: Herr, W., Heine, N., Rasel, E. M., Müller, J., and Timmen, L.: Gravity data acquisition and validation of the interferometric meaurement concept with the transportable absolute Quantum Gravimeter QG-1, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-11635, https://doi.org/10.5194/egusphere-egu22-11635, 2022.
