Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 33: Poster Session II
A 33.13: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal
The ALPHATRAP g-Factor Experiment — •Ioanna Arapoglou1,2, Alexander Egl1,2, Martin Höcker1, Sandro Kraemer1,2, Tim Sailer1,2, Andreas Weigel1,2, Robert Wolf1, Sven Sturm1, and Klaus Blaum1 — 1Max Planck Institute for Nuclear Physics, Heidelberg — 2Faculty of Physics and Astronomy, University of Heidelberg
ALPHATRAP is a high-precision Penning-trap experiment which aims for the most stringent test of bound-state quantum electrodynamics (BS-QED) in the strong field regime. These fields are provided by heavy highly charged ions (HCI), such as hydrogen-like 208Pb81+, where the electron is exposed to the strong binding potential of the nucleus. The heavy HCI are externally produced and delivered via a beamline to the cryogenic double Penning-trap system, which enables a measurement of the bound electron’s g-factor. For the external ion production, the setup is equipped with an external non-cryogenic compact room temperature Electron Beam Ion Trap (EBIT) and a laser ionization source. Additionally, part of the beamline will be connecting the Heidelberg-EBIT to the Penning-trap setup. Currently, experiments are performed at ALPHATRAP with 40Ar13+ ion, in preparation for the first g-factor measurement. For further reduction of energy related systematic shifts, sympathetic laser cooling using 9Be+ will be implemented which is expected to improve the precision of the measurement besides permitting two-ion Coulomb crystallization. The ALPHATRAP setup as well as the current status of the experiment and the first results with trapped highly charged ions will be discussed.