https://doi.org/10.1140/epjs/s11734-023-01005-1
Regular Article
Spatial magnetic field mapping with Raman spectra of laser-cooled atoms in free-fall
Department of Physics, Naval Postgraduate School, Monterey, CA, USA
Received:
3
August
2023
Accepted:
3
October
2023
Published online:
13
December
2023
For upcoming experiments, we require a linear magnetic field to be applied over the longitudinal extent of an atom’s trajectory through a vertically oriented atom interferometer. Additionally, we plan to use magnetically sensitive states. This combination comes at the cost of increased sensitivity to noise in the external field environment and, as a result, the magnetic field must be more carefully characterized and controlled than in a standard atom interferometer. We present our methods to characterize an extended, linear magnetic field environment which can be suitable for making such a system. We perform standard Raman spectroscopy but by adding time resolution to the spectroscopy, we are able to use the expansion of a thermal cloud of atoms to sample a large range along the ballistic atom path with a single spectrum. A small number of these spectra can then be used to map the field along the entire path with better precision than standard Raman spectroscopy.
This research was performed while the first author held an NRC Research Associateship award at the Naval Postgraduate School.
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© This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
