Faculté des sciences

Laser collimation of a continuous beam of cold atoms using Zeeman-shift degenerate-Raman-sideband cooling

Di Domenico, Gianni ; Castagna, N. ; Mileti, Gaetano ; Thomann, Pierre ; Taichenachev, A. V. ; Yudin, V. I.

In: Physical Review A, 2004, vol. 69, no. 063403, p. 1-9

In this article we report on the use of degenerate-Raman-sideband cooling for the collimation of a continuous beam of cold cesium atoms in a fountain geometry. Thanks to this powerful cooling technique we have reduced the atomic beam transverse temperature from 60 μK to 1.6 μK in a few milliseconds. The longitudinal temperature of 80 μK is not modified. The flux density, measured after a... Plus

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    Summary
    In this article we report on the use of degenerate-Raman-sideband cooling for the collimation of a continuous beam of cold cesium atoms in a fountain geometry. Thanks to this powerful cooling technique we have reduced the atomic beam transverse temperature from 60 μK to 1.6 μK in a few milliseconds. The longitudinal temperature of 80 μK is not modified. The flux density, measured after a parabolic flight of 0.57 s, has been increased by a factor of 4 to approximately 107 at. s−1 cm−2 and we have identified a Sisyphus-like precooling mechanism which should make it possible to increase this flux density by an order of magnitude.