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arXiv 2609.16713physics.ins-det

通过无液氦超导磁体彭宁阱中的单离子荧光实现回旋频率稳定性

Cyclotron-Frequency Stability via Single-Ion Fluorescence in a Penning Trap with a Cryogen-Free Superconducting Magnet

  • Universidad de Granada(格拉纳达大学)
  • Johannes Gutenberg-Universität Mainz(约翰内斯·古腾堡美因茨大学)
  • Helmholtz-Institut Mainz(美因茨亥姆霍兹研究所)
  • GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI重离子研究中心有限公司)

机构由 AI 辅助整理,请以论文原文为准。

Anna Schupeta, David Yousaf, Manuel Almagro, Manuel Hurtado, José M. Palomino, Joaquín Berrocal, Michael Block, Christoph E. Düllmann, Daniel Rodríguez

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AI总结:

本研究利用两种光子探测技术测量单钙离子回旋频率,评估无液氦超导磁体彭宁阱的磁场稳定性,测得长期漂移与液氦系统相当,短期波动达5e-8,并实现秒级频率测量。

AI中文摘要:

在本工作中,我们通过测量单个激光冷却钙离子的回旋频率,研究了采用无液氦超导磁体运行的彭宁阱的磁场稳定性。我们使用了两种互补的基于光子的探测技术:一种用于确定离子三个本征频率的脉冲光学方法,以及荧光探测傅里叶变换离子回旋共振(FD-FT-ICR)技术。对于前一种技术,我们重新审视了数据分析流程,将其视为测量不确定度的主要贡献来源,并得到了长期磁场漂移 $(1/B)(dB/dt) = -3.07(32)\times10^{-9}$ $\text{h}^{-1}$。该值与使用液氦基超导磁体的高精度彭宁阱实验所报道的值相当。我们使用FD-FT-ICR技术研究了短期稳定性,在30至60秒的平均时间内,得到了最小相对磁场变化 $\delta B/B \simeq 5\times10^{-8}$。此外,该技术能够在短至几秒的时间尺度上直接确定回旋频率,从而能够获取在传统彭宁阱实验中通常无法分辨的磁场波动。

英文摘要:

In this work, we investigate the magnetic-field stability of a Penning trap operated with a cryogen-free superconducting magnet through cyclotron-frequency measurements of a single laser-cooled calcium ion using two complementary photon-based detection techniques: a pulsed optical method for determining the three ion eigenfrequencies and Fluorescence-Detected Fourier-Transform Ion-Cyclotron-Resonance (FD-FT-ICR). For the former technique, the data-analysis procedure was revisited, considering it as the dominant contribution to the measurement uncertainty and yielding a long-term magnetic-field drift $(1/B)(dB/dt) = -3.07(32)\times10^{-9}$ $\mathrm{h}^{-1}$. This value is comparable to those reported for high-precision Penning-trap experiments employing liquid-helium-based superconducting magnets. The short-term stability was investigated using the FD-FT-ICR technique, resulting in a minimum relative magnetic-field variation of $δB/B \simeq 5\times10^{-8}$ for averaging times between 30 and 60 s. Furthermore, this technique enables direct cyclotron-frequency determinations on timescales as short as a few seconds, providing access to magnetic-field fluctuations that are generally not resolved in conventional Penning-trap experiments.

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