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Efficient 2D molasses cooling of a cesium beam using a blue detuned top-hat beam

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Abstract

We have performed a 2D blue detuned Sisyphus collimation of a cesium beam. Compared to a red detuned Doppler transverse molasses cooling, the setup was found very advantageous because of its faster cooling time allowing a short (\({1}~\text {cm}\)) cooling length and thus finally a denser atomic beam. A fibered laser was developed delivering up to \({500}\,\text {mW}\) fiber coupled optical power. A 2D collimation was realized but this can be done only if the two cooling zones were not overlapping. A beam density enhancement of more than 10 was observed. We found that a simple top-hat beam was more efficient than a Gaussian one. Similar cooling applies to other atom species and leads to a simple method to produce bright collimated atomic beams.

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Data Availability Statement

“This manuscript has no associated data in a data repository. [Authors’ comment: The data that support the findings of this study are available from the corresponding author upon reasonable request.]”

Notes

  1. www.altechna.com reference 1-PL-1-B9201.

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Acknowledgements

This work was supported by the Agence Nationale de la Recherche (ANR) (LAB COM-17 LCCO 0002 01); Conseil Régional Nouvelle Aquitaine (2017-1R50302-00013493) and the Fond Unique Interministériel (IAPP-FUI-22) COLDFIB.

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Authors and Affiliations

  1. Orsay Physics, ZAC ST Charles, 3ème Avenue, no95, 13710, Fuveau, France

    M. Reveillard & M. Viteau

  2. Laboratoire Photonique Numérique et Nanosciences (LP2N), UMR 5298, IOGS-CNRS, Université de Bordeaux, 33400, Talence, France

    G. Santarelli & B. Battelier

  3. AzurLight Systems, 33600, Pessac, France

    G. Guiraud & N. Traynor

  4. iXblue, 33400, Talence, France

    L. Antoni-Micollier & B. Desruelle

  5. Université Paris-Saclay, CNRS, Laboratoire Aimé Cotton, 91405, Orsay, France

    D. Comparat

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  1. M. Reveillard
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Reveillard, M., Viteau, M., Santarelli, G. et al. Efficient 2D molasses cooling of a cesium beam using a blue detuned top-hat beam. Eur. Phys. J. D 76, 35 (2022). https://doi.org/10.1140/epjd/s10053-022-00361-2

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