Hannover 2016 – scientific programme
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A: Fachverband Atomphysik
A 30: Precision spectroscopy of atoms and ions (with Q)
A 30.2: Poster
Wednesday, March 2, 2016, 16:30–19:00, Empore Lichthof
The ALPHATRAP g-Factor Experiment — •Andreas Weigel1,2, Ioanna Arapoglou1,2, Alexander Egl1,2, Henrik Hirzler1,2, Sandro Kraemer1,2, Tim Sailer1,2, Robert Wolf1, 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 being set up 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] in a cryogenic double Penning-trap system. 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, will be coupled via an ultra-high vacuum beamline to the Heidelberg Electron-Beam Ion Trap, which provides the highly charged ions. 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 with high precision. An overview and the current status of the project will be presented.