Hannover 2020 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Poster Session - Atomic Physics II
A 14.7: Poster
Dienstag, 10. März 2020, 16:00–18:00, Empore Lichthof
First results of the Alphatrap g-factor experiment — •Fabian Heiße1, Ioanna Arapoglou1, Alexander Egl1, Felix Hahne1,2, Martin Höcker1, Peter Micke1,3, Tim Sailer1, Bingsheng Tu1, Andreas Weigel1, José R. Crespo López-Urrutia1, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2Fakultät für Physik und Astronomie, Universität Heidelberg — 3Physikalisch-Technische Bundesanstalt (PTB), Braunschweig
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 lead. There, an electrical field strength on the order of 1016 V/cm acts on the electron, allowing to test bound-state QED with highest precision.
Our first measurement results of the g-factor of a single boron-like 40Ar13+ ion as well as the laser spectroscopy of its 2p2P1/2 – 2P3/2 fine-structure transition will be presented [1–2]. Furthermore, an outlook on upcoming studies and prospects will be given.
[1] I. Arapoglou et al. Phys. Rev. Lett. 122, 253001 (2019)
[2] A. Egl et al. Phys. Rev. Lett. 123, 123001 (2019)