Erlangen 2022 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Precision spectroscopy of atoms and ions (joint session A/Q)
A 20.13: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
Status of the Alphatrap g-factor experiment — •Fabian Heiße1, Charlotte König1, Jonathan Morgner1, Tim Sailer1, Bingsheng Tu1,2, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2Fudan University, China
Quantum electrodynamics (QED) is considered to be the most successful quantum field theory in the Standard Model. Its most precise test is conducted via the comparison of QED calculations with the measurement of the free electron g-factor. However, this test is restricted to low electrical field strengths. Consequently, it is of utmost importance to perform similar tests at high field strengths.
The Alphatrap experiment is a dedicated cryogenic Penning-trap setup to measure the g-factor of bound electrons in highly charged ions up to hydrogen-like uranium [1]. There, an electric field strength on the order of 1016 V/cm acts on the electron, allowing to test bound state QED with highest precision.
Our latest measurements of the g-factor for different charge states of a single tin ion are presented. Furthermore, an outlook on upcoming studies and prospects will be given.
[1] S. Sturm et al., Eur. Phys. J. Spec. Top. 227, 14251491 (2019)