By the moving molasses technique we have extracted laser-cooled cesium atoms in a continuous way directly from an optical molasses. The mean launching velocity is precisely tunable from 1 to 12 m/s. The atomic beam has a flux of 1.3 x 10(8) atom/s at 7 m/s and a longitudinal temperature of 70 mu K; which represents the highest flux and lowest velocity spread obtained so far in a continuous beam of cold atoms. These features makes it well suited for atomic fountains. The atomic flux can be slightly increased in a two-dimensional magneto-optical trap operation (+40%). A simple model accounts for the observed dependence of the flux with the magnetic-field gradient. [S1050-2947(99)51212-2]. [References: 11]
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机译：通过移动糖蜜技术，我们直接从光学糖蜜中连续提取了激光冷却的铯原子。平均发射速度可在1至12 m / s的范围内精确调整。原子束在7 m / s时的通量为1.3 x 10（8）atoms / s，纵向温度为70μK。它代表了迄今为止在冷原子连续束中获得的最高通量和最低速度分布。这些功能使其非常适合原子喷泉。在二维磁光阱操作中，可以稍微增加原子通量（+ 40％）。一个简单的模型说明了磁通量与磁场梯度之间的相关性。 [S1050-2947（99）51212-2]。 [参考：11]
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