论文标题
Kriss的YB光学晶格时钟的黑体辐射转移的评估
Evaluation of the blackbody radiation shift of an Yb optical lattice clock at KRISS
论文作者
论文摘要
由于光学时钟得到改进，以达到低于10 $^{ - 17} $级别的频率不确定性，因此由于黑体辐射（BBR）引起的频移一直是阻碍进一步改善的主要系统效应之一。为了评估Kriss的YB光学晶格时钟的BBR移位，我们安装了Vacuum BBR屏蔽层，并使用黑色涂层的球形热探测器进行了辐射温度计。在定量测量热探针的传导损失和所有外部辐射源的效果之后，我们确定了原子陷阱位点的温度，不确定性为13 MK，这对应于时钟频率的不确定性为0.22 MHz（分数频率为$ 4.2 \ times10^times10^{-19} $）。包括原子响应在内的BBR偏移的总不确定性为$ 9.5 \ times10^{ - 19} $。
As optical clocks are improved to reach the frequency uncertainty below the 10$^{-17}$ level, the frequency shift due to the blackbody radiation (BBR) has been one of the major systematic effects hindering further improvement. To evaluate the BBR shift of an Yb optical lattice clock at KRISS, we installed an in-vacuum BBR shield and made radiation thermometry using a black-coated-sphere thermal probe. After we quantitatively measured the conduction loss of the thermal probe and the effects of all the external radiation sources, we determined the temperature at the atom trap site with an uncertainty of 13 mK, which corresponds to an uncertainty of 0.22 mHz in the clock frequency (a fractional frequency of $4.2\times10^{-19}$). The total uncertainty of the BBR shift including the atomic response is $9.5\times10^{-19}$.
