SAMOP 2023 – scientific programme

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A: Fachverband Atomphysik

A 12: Poster I

A 12.20: Poster

Tuesday, March 7, 2023, 16:30–19:00, Empore Lichthof

Status of the Alphatrap g-factor experiment — •Valentin Hahn, Fabian Heiße, Charlotte König, Jonathan Morgner, Fabian Raab, Sven Sturm, and Klaus Blaum — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

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 beyond hydrogen-like lead [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 highly charged 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)