Linear Paul trap design for an optical clock with Coulomb crystals
Linear Paul trap design for an optical clock with Coulomb crystals
复制标题
DOI：
10.1007/s00340-011-4790-y
复制
发表时间：
2011-09
期刊：
影响因子：
--
通讯作者：
N. Herschbach;K. Pyka;Jonas Keller;T. Mehlstaubler
中科院分区：
文献类型：
--
作者：
N. Herschbach;K. Pyka;Jonas Keller;T. Mehlstaubler
我们报告了一个分段的线性保罗陷阱的光学时钟应用程序使用捕获离子库仑晶体的设计。为了提高光学钟的短期稳定度和分数频率不确定度为10−18，我们提出了115In+离子被172Yb+共振冷却。我们讨论了这样的频率标准的系统频率偏移。特别是，我们阐述了高精度计算的离子阱的射频电场的有限元方法。这些计算被用来找到一个可扩展的设计，在相应的二阶多普勒频移对频率标准的相对不确定度的贡献小于10− 18的水平上，使离子的过度微动最小化。
We report on the design of a segmented linear Paul trap for optical clock applications using trapped ion Coulomb crystals. For an optical clock with an improved short-term stability and a fractional frequency uncertainty of 10−18, we propose115In+ions sympathetically cooled by172Yb+. We discuss the systematic frequency shifts of such a frequency standard. In particular, we elaborate on high-precision calculations of the electric radiofrequency field of the ion trap using the finite element method. These calculations are used to find a scalable design with minimized excess micromotion of the ions at a level at which the corresponding second-order Doppler shift contributes less than 10−18to the relative uncertainty of the frequency standard.