An ultralow-noise superconducting radio-frequency ion trap for frequency metrology with highly charged ions

authored by: J. Stark, C. Warnecke, S. Bogen, S. Chen, E. A. Dijck, S. Kühn, M. K. Rosner, A. Graf, J. Nauta, J. -H. Oelmann, L. Schmöger, M. Schwarz, D. Liebert, L. J. Spieß, S. A. King, T. Leopold, P. Micke, P. O. Schmidt, T. Pfeifer, J. R. Crespo López-Urrutia
Abstract: We present a novel ultrastable superconducting radio-frequency (RF) ion trap realized as a combination of an RF cavity and a linear Paul trap. Its RF quadrupole mode at 34.52 MHz reaches a quality factor of \(Q\approx2.3\times 10^5\) at a temperature of 4.1 K and is used to radially confine ions in an ultralow-noise pseudopotential. This concept is expected to strongly suppress motional heating rates and related frequency shifts which limit the ultimate accuracy achieved in advanced ion traps for frequency metrology. Running with its low-vibration cryogenic cooling system, electron beam ion trap and deceleration beamline supplying highly charged ions (HCI), the superconducting trap offers ideal conditions for optical frequency metrology with ionic species. We report its proof-of-principle operation as a quadrupole mass filter with HCI, and trapping of Doppler-cooled \({}^9\text{Be}^+\) Coulomb crystals.
Organisation(s): Institute of Quantum Optics
QuantumFrontiers
External Organisation(s): Max Planck Institute for Nuclear Physics
Heidelberg University
Chinese Academy of Sciences (CAS)
National Metrology Institute of Germany (PTB)
Type: Article
Journal: Review of scientific instruments
Volume: 92
ISSN: 0034-6748
Publication date: 18.08.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Instrumentation
Electronic version(s): https://arxiv.org/abs/2102.02793 (Access: Open)
https://doi.org/10.1063/5.0046569 (Access: Closed)

BibTeX

@article{601a06dcedf74295b17d7df25d51689d,
title = "An ultralow-noise superconducting radio-frequency ion trap for frequency metrology with highly charged ions",
abstract = " We present a novel ultrastable superconducting radio-frequency (RF) ion trap realized as a combination of an RF cavity and a linear Paul trap. Its RF quadrupole mode at 34.52 MHz reaches a quality factor of \(Q\approx2.3\times 10^5\) at a temperature of 4.1 K and is used to radially confine ions in an ultralow-noise pseudopotential. This concept is expected to strongly suppress motional heating rates and related frequency shifts which limit the ultimate accuracy achieved in advanced ion traps for frequency metrology. Running with its low-vibration cryogenic cooling system, electron beam ion trap and deceleration beamline supplying highly charged ions (HCI), the superconducting trap offers ideal conditions for optical frequency metrology with ionic species. We report its proof-of-principle operation as a quadrupole mass filter with HCI, and trapping of Doppler-cooled \({}^9\text{Be}^+\) Coulomb crystals. ",
keywords = "physics.atom-ph",
author = "J. Stark and C. Warnecke and S. Bogen and S. Chen and Dijck, {E. A.} and S. K{\"u}hn and Rosner, {M. K.} and A. Graf and J. Nauta and Oelmann, {J. -H.} and L. Schm{\"o}ger and M. Schwarz and D. Liebert and Spie{\ss}, {L. J.} and King, {S. A.} and T. Leopold and P. Micke and Schmidt, {P. O.} and T. Pfeifer and L{\'o}pez-Urrutia, {J. R. Crespo}",
note = "Funding Information: We acknowledge the MPIK engineering design office led by Frank M{\"u}ller, the MPIK mechanical workshop led by Thorsten Spranz, and the MPIK mechanical apprenticeship workshop led by Stefan Flicker and Florian S{\"a}ubert for their expertise and the fabrication of numerous parts as well as the development of sophisticated fabrication procedures of complex parts. We also thank Thomas Busch, Lukas Dengel, Nils Falter, Christian Kaiser, Oliver Koschor-reck, Steffen Vogel, and Peter Werle for their technical support. We thank J. Iversen, D. Reschke, and L. Steder for support and discussions. This project received funding from the Max-Planck Society, the Max-Planck–Riken–PTB-Center for Time, Constants and Fundamental Symmetries, the European Metrology Programme for Innovation and Research (EMPIR), which is co-financed by the Participating States and from the European Union{\textquoteright}s Horizon 2020 research and innovation program (Project No. 17FUN07 CC4C), and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the collaborative research center SFB 1225 ISOQUANT, through Germany{\textquoteright}s Excellence Strategy–EXC-2123 QuantumFrontiers–390837967, and through SCHM2678/5-1.Publisher Copyright: ",
year = "2021",
month = aug,
day = "18",
doi = "10.1063/5.0046569",
language = "English",
volume = "92",
journal = "Review of scientific instruments",
issn = "0034-6748",
publisher = "American Institute of Physics",
number = "8",
}