TY - JOUR

T1 - An ultralow-noise superconducting radio-frequency ion trap for frequency metrology with highly charged ions

AU - Stark, J.

AU - Warnecke, C.

AU - Bogen, S.

AU - Chen, S.

AU - Dijck, E. A.

AU - Kühn, S.

AU - Rosner, M. K.

AU - Graf, A.

AU - Nauta, J.

AU - Oelmann, J. -H.

AU - Schmöger, L.

AU - Schwarz, M.

AU - Liebert, D.

AU - Spieß, L. J.

AU - King, S. A.

AU - Leopold, T.

AU - Micke, P.

AU - Schmidt, P. O.

AU - Pfeifer, T.

AU - López-Urrutia, J. R. Crespo

N1 - Funding Information: We acknowledge the MPIK engineering design office led by Frank Müller, the MPIK mechanical workshop led by Thorsten Spranz, and the MPIK mechanical apprenticeship workshop led by Stefan Flicker and Florian Säubert 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’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’s Excellence Strategy–EXC-2123 QuantumFrontiers–390837967, and through SCHM2678/5-1.Publisher Copyright:

PY - 2021/8/18

Y1 - 2021/8/18

N2 - 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.

AB - 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.

KW - physics.atom-ph

UR - http://www.scopus.com/inward/record.url?scp=85113383409&partnerID=8YFLogxK

U2 - 10.1063/5.0046569

DO - 10.1063/5.0046569

M3 - Article

VL - 92

JO - Review of scientific instruments

JF - Review of scientific instruments

SN - 0034-6748

IS - 8

M1 - 083203

ER -