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锶光钟Zeeman减速器中截止速度对蓝磁光阱原子数的影响

Influence of Cut-off Speed on Atomic Number of Blue Magneto-Optical Trap in Zeeman Slower of Strontium Optical Clock

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摘要

基于分布函数理论,分析了Zeeman减速器中截止速度对蓝磁光阱装载的影响,研究了Zeeman减速器中截止速度与蓝磁光阱俘获原子数目之间的关系,对比了分布函数理论和通用理论两种模型的拟合结果,结果表明,分布函数理论模型能更好地描述两者之间的关系。利用多匝Zeeman减速器对进入蓝磁光阱的热原子束进行减速,制备了锶光钟的冷原子样品。在光钟系统研制中,利用分布函数理论对Zeeman减速器进行了优化设计,提高了Zeeman减速器的工作效率,为实现更高效更紧凑的Zeeman减速器及光钟小型化提供了参考。

Abstract

The influence of cut-off speed in a Zeeman slower on the loading of blue magneto-optical trap based on the distribution function theory is analyzed and the relationship between the cut-off speed and the number of atoms trapped by the blue magneto-optical trap is investigated. A comparison between the fitting results from the distribution function theory and that from the general theory indicates that the distribution function theory model can better analyze the relationship between the above two. The cold atomic sample for strontium optical clock is prepared by the usage of a multi-turns Zeeman slower for slowing down the thermal atomic beam entering the blue magneto-optical trap. In the optical clock system, the design of the Zeeman slower is optimally designed based on the distribution function theory and thus the work efficiency of the Zeeman slower is improved. This research lays the foundation to achieve a more efficient and compact Zeeman slower and the miniaturization of an optical clock.

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中图分类号:O436.2;O431.2

DOI:10.3788/aos201838.0702001

所属栏目:原子与分子物理

基金项目:国家自然科学基金(11474282,61775220)、中国科学院前沿科学重点研究项目(QYZDB-SSW-JSC004)、中国科学院战略性先导科技专项(B类)(XDB21030700)

收稿日期:2018-01-04

修改稿日期:2018-01-31

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韩建新:中国科学院国家授时中心时间频率基准重点实验室, 陕西 西安 710600中国科学院大学, 北京 100049
卢晓同:中国科学院国家授时中心时间频率基准重点实验室, 陕西 西安 710600中国科学院大学, 北京 100049
卢本全:中国科学院国家授时中心时间频率基准重点实验室, 陕西 西安 710600中国科学院大学, 北京 100049
王叶兵:中国科学院国家授时中心时间频率基准重点实验室, 陕西 西安 710600中国科学院大学, 北京 100049
孔德欢:中国科学院国家授时中心时间频率基准重点实验室, 陕西 西安 710600
张首刚:中国科学院国家授时中心时间频率基准重点实验室, 陕西 西安 710600
常宏:中国科学院国家授时中心时间频率基准重点实验室, 陕西 西安 710600

联系人作者:常宏(changhong@ntsc.ac.cn)

备注:韩建新(1990-),男,博士研究生,主要从事光频标方面的研究。E-mail: hanjianxinabc@126.com

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引用该论文

Han Jianxin,Lu Xiaotong,Lu Benquan,Wang Yebing,Kong Dehuan,Zhang Shougang,Chang Hong. Influence of Cut-off Speed on Atomic Number of Blue Magneto-Optical Trap in Zeeman Slower of Strontium Optical Clock[J]. Acta Optica Sinica, 2018, 38(7): 0702001

韩建新,卢晓同,卢本全,王叶兵,孔德欢,张首刚,常宏. 锶光钟Zeeman减速器中截止速度对蓝磁光阱原子数的影响[J]. 光学学报, 2018, 38(7): 0702001

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