Analysis of the blackbody-radiation shift in an ytterbium optical lattice clock
Analysis of the blackbody-radiation shift in an ytterbium optical lattice clock
复制标题
镱光学晶格钟黑体辐射位移分析
DOI：
10.1088/1674-1056/25/10/103202
复制
发表时间：
2016
影响因子：
1.7
通讯作者：
Xu, Xin-Ye
中科院分区：
文献类型：
--
作者：
Xu, Yi-Lin;Xu, Xin-Ye
本文利用温度测量和数值模拟的方法，精确地计算了171 Yb光晶格钟的黑体辐射位移。在这个工作。对于黑体辐射位移，考虑三个主要辐射源，包括加热的原子炉、热真空室和室温真空窗。在时钟运行期间，通过使用七个校准的温度传感器测量真空室外表面上的温度。然后根据测量的温度，通过数值模拟的方法推断出真空室内的温度分布。此外，我们还模拟了环境温度波动时冷原子周围温度的变化。最后，我们得到了171 Yb光晶格钟的总黑体辐射位移为-1.289（7）Hz，不确定度为1.25 × 10−17。该方法适用于在真空室中缺少传感器的情况下，精确估算光格钟的黑体辐射位移。
We accurately evaluate the blackbody-radiation shift in a 171Yb optical lattice clock by utilizing temperature measurement and numerical simulation. In this work. three main radiation sources are considered for the blackbody-radiation shift, including the heated atomic oven, the warm vacuum chamber, and the room-temperature vacuum windows. The temperatures on the outer surface of the vacuum chamber are measured during the clock operation period by utilizing seven calibrated temperature sensors. Then we infer the temperature distribution inside the vacuum chamber by numerical simulation according to the measured temperatures. Furthermore, we simulate the temperature variation around the cold atoms while the environmental temperature is fluctuating. Finally, we obtain that the total blackbody-radiation shift is -1.289(7) Hz with an uncertainty of 1.25 × 10−17 for our 171Yb optical lattice clock. The presented method is quite suitable for accurately evaluating the blackbody-radiation shift of the optical lattice clock in the case of lacking the sensors inside the vacuum chamber.