锶原子光晶格钟塞曼减速器的设计与实现  

Design and Construction of a Zeeman Slower for Sr Optical Clock

作　　者：张远洋[1] 方占军[2] 张志刚[1] 

机构地区：[1]北京大学信息科学技术学院,北京100871 [2]中国计量科学研究院电学与量子科学研究所,北京100013

出　　处：《光学学报》2010年第4期935-939,共5页Acta Optica Sinica

基　　金：国家科技支撑计划(2006BAK03A20)资助课题

摘　　要：介绍了一种以电脑程序模拟计算线圈分布的方法,以精确匹配作为锶原子光晶格钟中作为冷却装置的塞曼减速器的理论塞曼磁场。说明了优化设计程序的算法结构及基本流程,并对实验中的实际塞曼磁场和锶原子光晶格钟磁光阱信号进行测量。这种设计方法完全基于电脑程序的模拟运算,可以根据实际情况改变物理参数和磁场模型,并迅速有效地计算出与之匹配的线圈分布。计算磁场相对于理论磁场的均方根(RMS)达到2.17×10^(-4)T,实现了较高的磁场匹配度。A Zeeman slower is taken as the cooling device for Sr atomic beam injected into the magneto-optical trap （MOT）.An efficient method for design and construction of the Zeeman slower,which calculated the coil distribution exactly matching the analytical magnetic field by computer program,is proposed.The flow chart and the algorithm structure of the optimization design program are illustrated in detail.The experimental magnetic field produced by Zeeman slower coils and the signal from magneto-optical trap（MOT） are measured.Based on the computer program simulation,the model can be flexibly adjusted according to the experiment.The coil distribution can calculated by matching the change of parameters and analytical magnetic field.The RMS value between calculated field and analytical field is 2.17×10^（-4） T.

关 键 词：原子与分子物理 原子冷却 塞曼减速器 锶原子光晶格钟 

分 类 号：O436[机械工程—光学工程]