Mainz 2017 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 4: Precision Spectroscopy I
A 4.3: Vortrag
Montag, 6. März 2017, 15:15–15:30, N 3
The ALPHATRAP g-Factor Experiment — •Andreas Weigel1,2, Ioanna Arapoglou1,2, Alexander Egl1,2, Martin Höcker1, Sandro Kraemer1,2, Tim Sailer1,2, Robert Wolf1, José Ramon Crespo López-Urrutia1, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2Fakultät für Physik und Astronomie, Universität Heidelberg
The Penning-trap based experiment ALPHATRAP is currently in the commissioning phase at the Max-Planck-Institut für Kernphysik in Heidelberg. It is the follow-up to the Mainz g-factor experiment, which has performed the most sensitive test of bound-state quantum electrodynamics (BS-QED) by measuring the g-factor of the remaining electron bound in hydrogen-like 28Si13+ at an uncertainty level of
10−11 [1]. ALPHATRAP aims for g-factor measurements on even heavier highly charged ions up to hydrogen-, lithium- and boron-like lead, with simultaneously improved accuracy. To achieve this, the
ALPHATRAP experiment, consisting of an improved cryogenic double Penning-trap setup, is coupled via an ultra-high vacuum beamline to various ion-sources including the Heidelberg Electron-Beam Ion Trap. In combination with currently conducted BS-QED calculations, the measurements are expected to further contribute to the exploration of the limits of BS-QED and also aim for an independent determination of the fine-structure constant α. The current status of the project will be presented.
[1] S. Sturm et al., Phys. Rev. Lett. 107, 023002 (2011)