Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Ultra-cold atoms, ions and BEC
A 12.2: Poster
Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik
A New Experiment for the Measurement of the Nuclear Magnetic Moment of 3He2+ — •Antonia Schneider1,2, Klaus Blaum1, Andreas Mooser1, Alexander Rischka1, Stefan Ulmer3, and Jochen Walz4,5 — 1Max-Planck-Institute for Nuclear Physics — 2University of Heidelberg — 3RIKEN, Ulmer Fundamental Symmetries Laboratory — 4Institute for Physics, Johannes-Gutenberg University Mainz — 5Helmholtz-Institute Mainz
We construct a new experiment aiming at the first direct high-precision measurement of the 3He2+ nuclear magnetic moment µHe with a relative precision of 10−9 or better. The direct measurement of µHe will complement hyper-polarized 3He as an independent magnetometer, which exhibits smaller systematic corrections concerning sample shape, impurities and environmental dependencies compared to water NMR probes. Thus it has the potential to second magnetic field measurements using H2O as e.g. in the case of the g−2 measurement of the muon at Fermilab and J-PARC. In our experiment we will apply methods similar to those used in proton and antiproton magnetic moment measurements [1,2]. If applied to µHe the methods would lead to an insufficient detection fidelity, which is limited by the ions’ energy. Thus, we rely on sympathetic laser-cooling to deterministically decrease the ions’ energy and a novel Penning trap design optimized for nuclear spin-flip detection. The status of the experiment is presented.
[1] Schneider et al., Science, 1081 (2014)
[2] Smorra et al., Nature, 371 (2017)