A high-precision segmented Paul trap with minimized micromotion for an optical multiple-ion clock
A high-precision segmented Paul trap with minimized micromotion for an optical multiple-ion clock
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DOI：
10.1007/s00340-013-5580-5
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
K. Pyka;N. Herschbach;J. Keller;T. E. Mehlstäubler
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文献类型：
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作者：
K. Pyka;N. Herschbach;J. Keller;T. E. Mehlstäubler
我们提出了一个实验来描述我们为多离子光钟设计的新型线性离子陷阱，该光钟使用115英寸^+作为时钟离子。为了表征陷阱以及时钟离子的共鸣冷却，我们使用了172-Yb^+。通过有限元计算得到了疏水器的设计，并建立了第一个基于玻璃增强热固性层合板的样机。本文详细介绍了捕捉器的制作工艺和微动测量。利用光子相关光谱测量了运动幅度分辨率为1.1 nm的超微运动，并与有限元计算结果进行了比较。用这种方法，我们证明了由于|({\Delta}{\nu}/{\nu})|=8.5×10^-20的超微运动引起的系统时钟漂移的敏感性。基于我们的陷阱的轴向射频场的测量，我们估计每个陷阱段可以存储12个离子并用作光学频率标准，由于微运动，其分数不精度为1x10^-18。
We present an experiment to characterize our new linear ion trap designed for the operation of a many-ion optical clock using 115-In^+ as clock ions. For the characterization of the trap as well as the sympathetic cooling of the clock ions we use 172-Yb^+. The trap design has been derived from finite element method (FEM) calculations and a first prototype based on glass-reinforced thermoset laminates was built. This paper details on the trap manufacturing process and micromotion measurement. Excess micromotion is measured using photon-correlation spectroscopy with a resolution of 1.1nm in motional amplitude, and residual axial rf fields in this trap are compared to FEM calculations. With this method, we demonstrate a sensitivity to systematic clock shifts due to excess micromotion of |({\Delta}{\nu}/{\nu})| = 8.5x10^-20. Based on the measurement of axial rf fields of our trap, we estimate a number of twelve ions that can be stored per trapping segment and used as an optical frequency standard with a fractional inaccuracy of \leq 1x10^-18 due to micromotion.