用于精密实验的可扩展堆叠电极印刷电路板射频四极杆（PCB-RFQ）
A Scalable Stacked-Electrode Printed Circuit Board Radio-Frequency Quadrupole (PCB-RFQ) for Precision Experiments
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中文总结 AI 辅助
本文提出一种可扩展的堆叠电极PCB-RFQ阱，通过抑制高阶场分量并恢复60%阱深，实现快速冷却和低发射度，为精密实验提供低成本替代方案。
中文摘要 AI 辅助
线性射频四极杆（RFQ）阱对于跨多个物理平台（包括量子信息处理、精密原子光谱学以及高分辨率质谱或激光光谱学）的离子和相空间操控至关重要。我们展示了一种可扩展的多层印刷电路板（PCB）线性RFQ阱的设计、静电场优化和性能表征。通过利用基于PCB的“堆叠电极”几何结构来产生高质量的四极场，该架构相比平面“平坦表面电极”设计，可将高阶多极场分量抑制多达一个数量级，并可恢复理想双曲四极杆径向赝势阱深度的多达60%。在通过仿真和实验进行彻底优化和表征后，我们证明了其作为冷却聚束器的适用性，展示了快速氦缓冲气体冷却，时间常数介于34±3微秒至412±23微秒之间，并实现了仅58±4电子伏特·纳秒的高度压缩纵向相空间发射度。低束流发射度提供了对提取束团特性的灵活控制：弱提取场产生低至2.5±0.4电子伏特的能量展宽，而强场产生低至2.6±0.3纳秒的超窄时间宽度。这些结果确立了我们的PCB-RFQ平台作为传统机加工棒状RFQ组件的多功能、可扩展且经济高效的替代方案，适用于先进的离子阱、束流制备或量子应用。
英文摘要
Linear radio-frequency quadrupole (RFQ) traps are crucial for ion and phase-space manipulation across diverse physics platforms, including quantum information processing, precision atomic spectroscopy, and high-resolution mass or laser spectrometry. We present the design, electrostatic field optimization, and performance characterization of a scalable, multi-layer printed circuit board (PCB) linear RFQ trap. By utilizing a PCB-based "stacked-electrode" geometry to generate high-quality quadrupolar fields, this architecture suppresses higher-order multipole field components by up to an order of magnitude compared to planar "flat surface-electrode" designs and allows for reclaiming up to 60% of the radial pseudopotential-well depth of an ideal hyperbolic quadrupole. Following a thorough optimisation and characterization using both simulations and experiments, we demonstrate its suitability as a cooler buncher, showing rapid helium buffer-gas cooling with time constants between 34 +/- 3 us and 412 +/- 23 us, and achieving a highly compressed longitudinal phase-space emittance of only 58 +/- 4 eV*ns. The low beam emittance provides flexible control of the extracted bunch properties: weak extraction fields yield energy spreads down to 2.5 +/- 0.4 eV, whereas strong fields produce ultra-narrow temporal widths down to 2.6 +/- 0.3 ns. The results establish our PCB-RFQ platform as a versatile, scalable, and cost-effective alternative to traditionally machined rod-based RFQ assemblies for advanced ion-trapping, beam-preparation, or quantum applications.
发表机构
- The University of Edinburgh（爱丁堡大学）
- King Saud University（沙特国王大学）
- Instituto de Física Corpuscular, CSIC, Universidad de Valencia（瓦伦西亚大学西班牙国家科学研究委员会粒子物理研究所）
- GSI Helmholtzzentrum für Schwerionenforschung GmbH（德国重离子研究中心）
- Justus-Liebig-Universität Gießen（吉森大学）
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