Bi-color atomic beam slower and magnetic field compensation for ultracold gases

Transversely loaded bidimensional-magneto-optical-traps (2D-MOTs) have been recently developed as high flux sources for cold strontium atoms to realize a new generation of compact experimental setups. Here, we discuss on the implementation of a cross-polarized bi-color slower for a strontium atomic...

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Veröffentlicht in:AVS quantum science 2022-12, Vol.4 (4)
Hauptverfasser: Li, Jianing, Lim, Kelvin, Das, Swarup, Zanon-Willette, Thomas, Feng, Chen-Hao, Robert, Paul, Bertoldi, Andrea, Bouyer, Philippe, Kwong, Chang Chi, Lan, Shau-Yu, Wilkowski, David
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Sprache:eng
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Zusammenfassung:Transversely loaded bidimensional-magneto-optical-traps (2D-MOTs) have been recently developed as high flux sources for cold strontium atoms to realize a new generation of compact experimental setups. Here, we discuss on the implementation of a cross-polarized bi-color slower for a strontium atomic beam, improving the 2D-MOT loading and increasing the number of atoms up to ∼109 atoms in the 461 nm MOT. Our slowing scheme addresses simultaneously two excited Zeeman substates of the 88Sr 1S0→ 1P1 transition at 461 nm. We also realized a three-axis active feedback control of the magnetic field down to the microgauss regime. Such a compensation is performed thanks to a network of eight magnetic field probes arranged in a cuboid configuration around the atomic cold sample and a pair of coils in a quasi-Helmholtz configuration along each of three Cartesian directions. Our active feedback is capable of efficiently suppressing most of the magnetically induced position fluctuations of the 689 nm intercombination-line MOT.
ISSN:2639-0213
2639-0213
DOI:10.1116/5.0126745