Scientific Results

Design and characterization of a compact magnetic shield for ultracold atomic gas experiments

Year: 2019

Authors: Farolfi A., Trypogeorgos D., Colzi G., Fava E., Lamporesi G., Ferrari G.

Autors Affiliation: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy
Trento Institute for Fundamental Physics and Applications, INFN, 38123 Povo, Italy

Abstract: We report on the design, construction, and performance of a compact magnetic shield that facilitates a controlled, low-noise environment for experiments with ultracold atomic gases. The shield was designed to passively attenuate external slowly varying magnetic fields while allowing for ample optical access. The geometry, number of layers, and choice of materials were optimized using extensive finite-element numerical simulations. The measured performance of the shield is in good agreement with the simulations. From measurements of the spin coherence of an ultracold atomic ensemble, we demonstrate a residual field noise of 2.6 μG and a suppression of external dc magnetic fields by more than five orders of magnitude.

Journal/Review: REVIEW OF SCIENTIFIC INSTRUMENTS

Volume: 90      Pages from: 115114-1  to: 115114-6

KeyWords: Magnetic shield
DOI: 10.1063/1.5119915

Citations: 1
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