Imaging Microwave and DC Magnetic Fields in a Vapor-Cell Rb Atomic Clock

Affolderbach, Christoph and Du, Guan-Xiang and Bandi, Thejesh and Horsley, Andrew and Treutlein, Philipp and Mileti, Gaetano. (2015) Imaging Microwave and DC Magnetic Fields in a Vapor-Cell Rb Atomic Clock. IEEE transactions on instrumentation and measurement, 64 (12). pp. 3629-3637.

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Official URL: http://edoc.unibas.ch/40483/

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We report on the experimental measurement of the dc and microwave magnetic field distributions inside a recently developed compact magnetron-type microwave cavity mounted inside the physics package of a high-performance vapor-cell atomic frequency standard. Images of the microwave field distribution with sub-100-mu m lateral spatial resolution are obtained by pulsed optical-microwave Rabi measurements, using the Rb atoms inside the cell as field probes and detecting with a CCD camera. Asymmetries observed in the microwave field images can be attributed to the precise practical realization of the cavity and the Rb vapor cell. Similar spatially resolved images of the dc magnetic field distribution are obtained by Ramsey-type measurements. The T-2 relaxation time in the Rb vapor cell is found to be position dependent and correlates with the gradient of the dc magnetic field. The presented method is highly useful for experimental in situ characterization of dc magnetic fields and resonant microwave structures, for atomic clocks or other atom-based sensors and instrumentation.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentelle Nanophysik (Treutlein)
UniBasel Contributors:Treutlein, Philipp and Horsley, Andrew and Du, Guanxiang
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:20 Mar 2019 15:12
Deposited On:09 May 2016 12:57

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