SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 33: Precision Spectroscopy of Atoms and Ions V (joint session A/Q)
A 33.5: Vortrag
Freitag, 10. März 2023, 15:30–15:45, B302
Towards Coulomb coupling of a proton and a single 9Be+ ion by using a microfabricated Penning trap — •Julia-Aileen Coenders1, Jan Schaper1, Juan Manuel Cornejo1, Jacob Stupp1, Amado Bautista-Salvador2, Stefan Ulmer3,4, and Christian Ospelkaus1,2 — 1Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany — 2PTB, Bundesallee 100, 38116 Braunschweig, Germany — 3Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, Saitama 351-0198, Japan — 4HHU Düsseldorf, Universitässtraße 1, 40225 Düsseldorf, Germany
The BASE collaboration has allowed to measure the g-factor of single (anti-)protons stored in Penning traps with an unprecedented precision. At BASE Hannnover, we want to contribute to this goal by developing cooling and detection techniques based on the coupling of single (anti-)protons to single 9Be+ ions that are laser cooled to their motional ground state.
For the planned coupling and sympathetic cooling of a proton with a laser cooled 9Be+ ion, we need an asymmetric double well potential, due to the different masses of the particles. To generate this potential, a miniaturized trap geometry needs to be developed. Here we present the microfabrication steps that we applied to fused silica wafers to fabricate the cylindrical electrodes of our micro coupling Penning trap with an inner diameter of 0.8 mm and an axial length of 0.2 mm. In addition, we will show our latest results on adiabatic transport of single laser cooled 9Be+ ions, as well as the current work on the coupling of two 9Be+ ions in a macro coupling trap of 8 mm inner diameter.