NIM铯原子喷泉实现MOT-OM原子云并冷却到10μK

Realizing of MOT-OM Atom Clouds and Cooling to ～10μK on NIM Laser-cooled Cesium Fountain in 2000

报道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。实现了铯 (Cs)原子从磁光阱 (MOT)过渡到光学阻尼 (OM)的装载 冷却 ,利用飞行时间法记录到信噪比优于 40的原子云荧光信号 ;原子经后冷却达到 (10～ 15 ) μK ;用OM从铯蒸气直接获得了冷原子云。

In this paper we reported recent progresses on construction of the “NIM laser cooling - Cs fountain” apparatus: loading and cooling of Cs atoms form MOT transferred to OM was realized, Cs fluorescence TOF signal with S/N>40 recorded; atoms were cooled to (10～15)μK after post-cooling; and Cs atom cloud were obtained directly using OM.