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Journal Articles AVS Quantum Science Year : 2022

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

Abstract

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 ~ 10 9 atoms in the 461 nm MOT. Our slowing scheme addresses simultaneously two excited Zeeman substates of the 88Sr 1 S 0 → 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.

Dates and versions

obspm-03977440 , version 1 (07-02-2023)

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Jianing Li, Kelvin Lim, Swarup Das, Thomas Zanon-Willette, Chen-Hao Feng, et al.. Bi-color atomic beam slower and magnetic field compensation for ultracold gases. AVS Quantum Science, 2022, 4, ⟨10.1116/5.0126745⟩. ⟨obspm-03977440⟩
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