标题： 铯喷泉PTB-CSF2的分布式腔相位频率偏移 显示英文标题

标题： Distributed cavity phase frequency shifts of the caesium fountain PTB-CSF2

摘要： 我们通过频率测量和从头计算相结合的方法，评估了在Physikalisch-Technische Bundesanstalt的铯喷泉钟PTB-CSF2中分布式腔相位引起的频率误差。相关的不确定度为1.3E-16，频率偏差为0.4E-16。测量结果与计算结果的一致性解释了之前在高微波幅度下观察到的频率偏移。我们还评估了原子波包的微波透镜效应引起的频率偏差和不确定度。我们报告了PTB-CSF2的总系统不确定度为4.1E-16。 显示英文摘要

摘要： We evaluate the frequency error from distributed cavity phase in the caesium fountain clock PTB-CSF2 at the Physikalisch-Technische Bundesanstalt with a combination of frequency measurements and ab initio calculations. The associated uncertainty is 1.3E-16, with a frequency bias of 0.4E-16. The agreement between the measurements and calculations explains the previously observed frequency shifts at elevated microwave amplitude. We also evaluate the frequency bias and uncertainty due to the microwave lensing of the atomic wavepackets. We report a total PTB-CSF2 systematic uncertainty of 4.1E-16.