Simulation and Optimization of Miniature Ring-Endcap Ion Traps

Simulation and Optimization of Miniature Ring-Endcap Ion Traps
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微型环端盖离子阱的仿真与优化

DOI:
10.1088/0256-307x/31/4/043701
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发表时间:
2014-04
影响因子:
3.5
通讯作者:
Huang Xue-Ren
Huang Xue-Ren
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Cui Kai-Feng;Shang Jun-Juan;Shu Hua-Lin;Huang Xue-Ren

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随着光频标和精密光谱学中离子阱尺寸的减小,离子阱的俘获行为对阱几何形状的敏感性越来越突出。提出了一种用于单离子约束的微型阱的设计和构造指南,并提出了r(ring)/r(endcap)近似为0.5和z(0)近似为r(0)的优化组合,r(0)= 0.7 ± 0.2 mm。与Huang等人[Phys.Rev.A84(2011)053841]使用的阱相比,该设计可导致陷阱赝势增加20%以上,并且潜在非谐性降低90%以上。这些改进使阱更接近于理想的双曲面阱,以紧密地限制单个离子,同时具有较弱的微动的益处。考虑到电极加工和陷阱排列的不完善性,我们还证明了陷阱对称性的重要性,特别是在两个端盖电极上。
With the decrease in dimension of ion traps employed in optical frequency standards and precision spectroscopy, the sensitivity of trapping behavior to trap geometry is more and more prominent. We present a guide for the design and construction of a miniature trap for a single ion confinement, and propose an optimized combination of r(ring)/r(endcap) approximate to 0.5 and z(0) approximate to r(0) within the range of r(0) = 0.7 +/- 0.2 mm. Compared with the trap used by Huang et al. [Phys. Rev. A 84 (2011) 053841], the design can lead to an increase in trap pseudo-potential of more than 20% and a reduction on potential anharmonicity of more than 90%. The improvements make the trap closer to an ideal hyperboloidal trap to confine a single ion tightly with the benefit of weaker micro-motion. Considering the imperfection of electrodes machining and traps alignment, we also demonstrate the importance of trap symmetry, especially on two endcap electrodes.
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