Abstract
In this article, we measure the collimation of an atomic beam of strontium that emerges from an array of microtubes installed at the output of an atomic oven, through the characterization of the beam fluorescence caused by a monochromatic laser beam close to resonance with a strontium electronic transition, as a function of the transverse position at the atomic beam and the light detuning. We develop a theoretical model to obtain the total fluorescence rate as a function of the collimation of the atomic beam, the temperature of the atomic oven, and the laser frequency. Collision effects between the atoms, and the atoms with the recipient walls, are included to make the model realistic. The method and theory developed are useful to laboratories willing to implement such atomic sources, for experiments with atomic beams or cold atomic samples.
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Acknowledgments
The authors would like to thank Cleber Renato Mendonça and Jonathas de Paula Siqueira, from the Photonics group at IFSC-USP, for cutting the microtubes.
Funding
The authors acknowledge the funding through FAPESP projects 2013/04162-5, FAPESP 2018/00221-0, and FAPESP 2015/25146-3.
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P.G.S. Dias and M.A.F. Biscassi contributed equally to this work
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Dias, P.G.S., Biscassi, M.A.F., Magnani, P.H.N. et al. Characterization of the Collimation of an Atomic Beam with a Monochromatic Quasi-resonant Laser. Braz J Phys 51, 329–338 (2021). https://doi.org/10.1007/s13538-020-00837-9
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DOI: https://doi.org/10.1007/s13538-020-00837-9