Hannover 2020 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 15: Precision spectroscopy of atoms and ions II
A 15.1: Hauptvortrag
Mittwoch, 11. März 2020, 11:00–11:30, f107
The Alphatrap g-factor experiment — •Tim Sailer1, Ioanna Arapoglou1, Alexander Egl1, Felix Hahne1,2, Martin Höcker1, Peter Micke1,3, 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
The Penning-trap experiment Alphatrap, located at the Max-Planck-Institut für Kernphysik, aims to measure the g-factor of bound electrons in highly charged ions (HCI) up to hydrogen-like 208Pb81+. In the electrical field of the nucleus with a strength of the order of 1016 V/cm, bound-state quantum electrodynamics can be tested with highest precision in extreme conditions.
We recently performed the first measurements at the Alphatrap setup, measuring the g-factor of boron-like 40Ar13+. Additionally, a novel measurement technique that enables laser spectroscopy on single ions has been developed and was used to measure the 2p2P1/2 – 2P3/2 fine-structure transition on the same ion. Furthermore, the Alphatrap setup has recently been connected via a UHV beamline to the Heidelberg electron-beam-ion-trap (HD-EBIT), which gives access to heavy highly-charged ions. First ions produced in that EBIT have been successfully loaded and stored in Alphatrap with corresponding measurements being set up. The results of these measurements and prospects of upcoming studies will be discussed.