本文报导了中国计量科学研究院 (NIM)研制新一代“激光冷却铯原子喷泉”国家时间频率基准装置的进展 :实现了从磁光阱 (MOT)过渡到光学黏胶 (OM)装载 冷却铯 (Cs)原子 ,利用飞行时间 (TOF)法记录到信噪比优于4 0的原子云荧光信号 ;原子经后冷却达到 (1 0～ 2 0 ) μK ;用光学黏胶从铯蒸气直接获得了冷原子云。并给出了对实验的讨论。 This article reports the progress made by the National Institute of Metrology (NIM) on the development of a new generation of “time-frequency-calibrated laser-cooled cesium atom fountains”: the transition from a magneto-optical trap (MOT) to an optical load (OM) Cs) atoms were recorded, and the fluorescence signal of the atomic cloud with signal-to-noise ratio better than 40 was recorded by time-of-flight (TOF) method. The atoms were cooled down to (10 ~ 20) μK; Cold atomic cloud. And gives the discussion of the experiment.