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Tiecke, T. G.; Gensemer, S. D.; Ludewig, A.; Walraven, J. T. M.
Physical review. A, Atomic, molecular, and optical physics, 07/2009, Letnik: 80, Številka: 1Journal Article
We demonstrate a two-dimensional magneto-optical trap (2D MOT) as a beam source for cold {sup 6}Li atoms. The source is side loaded from an oven operated at temperatures in the range 600 < or approx. T < or approx. 700 K. The performance is analyzed by loading the atoms into a three-dimensional MOT located 220 mm downstream from the source. The maximum recapture rate of {approx}10{sup 9} s{sup -1} is obtained for T{approx_equal}700 K and results in a total of up to 10{sup 10} trapped atoms. The recaptured fraction is estimated to be 30{+-}10% and limited by beam divergence. The most-probable velocity in the beam ({alpha}{sub z}) is varied from 18 to 70 m/s by increasing the intensity of a push beam. The source is quite monochromatic with a full width at half maximum velocity spread of 11 m/s at {alpha}{sub z}=36 m/s, demonstrating that side loading completely eliminates beam contamination by hot vapor from the oven. We identify depletion of the low-velocity tail of the oven flux as the limiting loss mechanism. Our approach is suitable for other atomic species.
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