Laser collimation of a continuous beam of cold atoms using Zeeman-shift degenerate-Raman- sideband cooling
نویسندگان
چکیده
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 mK to 1.6 mK in a few milliseconds. The longitudinal temperature of 80 mK 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.
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