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Q: Fachverband Quantenoptik und Photonik
Q 27: Poster – Precision Spectroscopy of Atoms and Ions (joint session A/Q)
Q 27.21: Poster
Tuesday, March 3, 2026, 17:00–19:00, Philo 1. OG
Mechanical structure for alignment of a microfabricated cylindrical Penning trap — •Marek Prasse1, Jan Schaper1, Nikita Poljakov1, Philipp Hoffmann1, Julia Coenders1, Juan Manuel Cornejo2, Stefan Ulmer3,4, and Christian Ospelkaus1,5 — 1Leibniz Universität Hannover — 2Universidad de Cádiz, Spain — 3Ulmer Fundamental Symmetries Laboratory, RIKEN, Japan — 4Heinrich-Heine-Universität Düsseldorf, Germany — 5Physikalisch-Technische Bundesanstalt, Braunschweig, Germany
As part of the BASE collaboration, we aim to contribute to CPT symmetry tests by high-precision (anti-)proton g-factor measurements[1,2]. We use a cryogenic multi-Penning trap and want to implement quantum logic spectroscopy techniques with 9Be+ as cooling and logic ion. While optical sideband spectroscopy[3], ground-state cooling[4], and fast adiabatic transport[5] of single 9Be+ ions has been achieved, a microfabricated cylindrical Penning trap (d=800 µm) will be added for ground-state cooling and spin-state detection of (anti-)protons by Coulomb coupling to 9Be+. Particle confinement during ion-transport then requires a precise alignment with the magnetic field. We present a custom-made two-axis mechanical feedthrough suitable for the ≈ 40 kg weight of the experimental structure and with low heat flow to the cryogenic stages that has been designed and is in commissioning. [1]C. Smorra et al., Eur. Phys. J. Special Topics 224, 3055-3108 (2015) [2]J.M. Cornejo et al., New J. Phys. 23 (2021) [3]J.M. Cornejo et al., Phys. Rev. Res. 5 (2023) [4]J.M. Cornejo et al., Phys. Rev. Res. 6 (2024) [5]M. v. Boehn et al., Comms. Phys. 8 (2025)
Keywords: CPT; proton; antiproton; g-factor; Penning