摘要
在前期二维磁光阱原子冷却实验的基础上,提出了一种利用二维磁光阱产生低速铯束替代传统铯原子钟原子束的方案。新方案可以有效降低铯束中原子的运动速度,压窄Ramsey线宽,从而实现慢速连续原子束原子钟。理论分析表明,该慢速冷原子光抽运铯原子钟的Ramsey线宽为同体积传统热束小铯钟的十分之一,这将有效提高光抽运铯原子钟的短期稳定度,这种原子钟是未来守时原子钟的一种新的发展方向。
On the basis of previous 2D-MOT experiment,we put forward a kind of scheme that using 2D -MOT to slow the speed of cesium atoms in the cesium beam atomic clock. The new scheme can effectively reduce the speed of the atoms in the cesium beam and narrow down the line width of Ramsey fringe,thus realizes an atomic clock which has slow and continuous cesium beam. Theoretical analysis shows the line width of Ramsey fringe of the cold atom optical pumped cesium atomic clock is one-tenth of the width of traditional optical pumped cesium atomic clock, which will effectively improve the short-term stability of optical pumped cesium atomic clocks. This kind of atomic clock is a new direction of future atomic clock for time keeping.
作者
谢伟滨
王青
齐向晖
贺轩
陈徐宗
XIE Wei-bin;WANG Qing;QI Xiang-hui;HE Xuan;CHEN Xu-zong(Institute of Quantum Electronics,School of Electronics Engineering and Computer Science Peking University,Beijing 100871,China)
出处
《时间频率学报》
CSCD
2018年第3期179-184,共6页
Journal of Time and Frequency
关键词
冷原子
铯原子束
二维磁光阱
光抽运
cold atoms
cesium atomic beam
2D-MOT
optical pumping
