2000年NIM铯冷原子喷泉时间频率基准装置研究的进展  

Progresses of NIM Laser-cooled Cesium Fountain Time/Frequency Standard in 2000

作　　者：李天初[1] 李明寿[1] 黄秉英[1] 钱进[1] 林平卫[1] 费全度[1] 干云清[1] 辛明德[1] 王平[1] 石春英[1] 赵晓惠[1] 吴长华[1] 

机构地区：[1]中国计量科学研究院,北京100013

出　　处：《现代计量测试》2001年第2期8-12,5,共6页Modern Measurement and Test

摘　　要：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。In this paper we reported recent progresses on construction of the “NIM laser cooling\|Cs fountain” apparatus targeting as Chinese new generation time/frequency primary standard: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 (10～20)μK with post\|cooling;and Cs atom cloud were obtained using OM directly.We also gave discussions on results of the experiments mentioned above.

关 键 词：激光冷却铯原子喷泉 磁光阱 冷原子云 飞行时间法 时间频率基准装置 

分 类 号：TB939[一般工业技术—计量学]