Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 6: Precision Spectroscopy of Atoms and Ions I (joint session A/Q)
Q 6.2: Talk
Monday, March 10, 2025, 11:30–11:45, HS PC
A Cryogenic Permanent Magnet Penning Trap for Sympathetic Laser Cooling at µTEx — •Philipp Justus1,2, Anton Gramberg1,2, Stefan Dickopf1, Annabelle Kaiser1, Ankush Kaushik1, Marius Müller1, Stefan Ulmer3,4, Andreas Mooser1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik Heidelberg, Germany — 2Ruprecht-Karls Universität Heidelberg, Germany — 3Heinrich-Heine Universität Düsseldorf, Germany — 4RIKEN, Wako, Japan
Penning traps, being versatile tools for various high-precision measurements in atomic and nuclear physics, are used for nuclear magnetic moment measurements at the µTEx experiment in Heidelberg. The experiment aims to measure the 3He2+ nuclear magnetic moment with a relative uncertainty on the 10−9 level which relies on sympathetic laser cooling with 9Be+ [1-3].
To test and implement sympathetic laser cooling a new experimental setup has been developed. It consists of a five-electrode Penning trap with a permanent magnet system providing a homogeneous magnetic field of B ∼ 240 mT and cooled to T ∼ 4 K using a pulse tube cooler. The characterization of Doppler cooling at the 2S1/2 → 2P3/2 transition of 9Be+ will employ electronic and photonic detection mechanisms integrated into the system. The entire experiment is designed for quick adjustments and flexible modifications to the setup. In the talk I will present the current status of the design of the experiment.
[1] Mooser et al., J. Phys.: Conf. Ser. 1138 012004 (2018)
[2] Schneider et al., Nature 606, 2022
[3] Dickopf et al., Nature 632, 2024
Keywords: Precision Measurements; Penning Traps; g-factor measurements; Doppler Cooling; Sympathetic laser cooling