Cesium Atomic Fountain with Two-Dimensional Moving Molasses

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Abstract
In this paper we describe a cesium atomic fountain with two-dimensional moving molasses. This method is applicable for multipulse operation of the cesium atomic fountain frequency standard, which will improve the frequency stability and reduce the frequency shift due to spin exchange collisions of atomic fountain frequency standards. Multipulse launching is demonstrated experimentally, and the frequency shift due to the fluorescent light from the loaded atoms is estimated.