铯喷泉钟C场的测量与计算  

Measurement and Calculation of C Field of Cesium Fountain Clock

作　　者：刘洪康 刘昆[2] 韩蕾 房芳[2] 陈伟亮[2] 郑发松 戴少阳 左娅妮 李天初 LIU Hong-kang;LIU Kun;HAN Lei;FANG Fang;CHEN Wei-liang;ZHENG Fa-song;DAI Shao-yang;ZUO Ya-ni;LI Tian-chu(School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]北京理工大学光电学院,北京100081 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2023年第2期258-264,共7页Acta Metrologica Sinica

基　　金：国家重点研发计划重点专项(2016YFF0200202);中国计量科学研究院基本科研业务费重点领域项目(AKYZD2009)。

摘　　要：在铯原子喷泉钟实验中,C场均匀度决定了二阶塞曼频移的不确定度评定。使用微波激励法可以测量C场各个高度经时间加权的磁感应强度的平均值。为了得到C场的实际磁场分布,需要对微波激励法的测量结果进行去时间加权计算。介绍了两种去时间加权的算法,并利用仿真数据对算法进行了验证。最后使用微波激励法和两种去时间加权算法,结合蒙特卡洛不确定度评定方法对NIM6铯喷泉钟C场进行了测量与计算。In the cesium fountain clock experiment,the magnetic uniformity of C field determines the uncertainty evaluation of the second order Zeeman frequency shift.Microwave excitation method can be used to measure the average value of the time-weighted magnetic induction intensity at each height of the C field.In order to obtain the actual magnetic field distribution of C field,the measurement results of microwave excitation method need to be de-weighted.To introduces two de-time-weighted algorithms and verifies them with simulation data.Finally,the C field of NIM6 cesium fountain clock is measured and calculated by microwave excitation method and two de-time-weighted algorithms combined with Monte Carlo uncertainty evaluation method.

关 键 词：计量学 铯喷泉钟 C场 微波激励法 去时间加权 蒙特卡洛不确定度评定 

分 类 号：TB939[一般工业技术—计量学]