Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 45: Precision Spectroscopy V - highly charged ions (joint session A/Q)
Q 45.1: Talk
Wednesday, March 7, 2018, 14:00–14:15, K 1.016
Commissioning of the ALPHATRAP double Penning-trap system — •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
The ALPHATRAP experiment is a state-of-the-art Penning-trap setup aiming for high-precision g-factor measurements on heavy highly charged ions (HCI), such as hydrogen-like 208Pb81+. That way the most stringent test of bound-state quantum electrodynamics (BS-QED) can be carried out. The storage and manipulation of the ions is achieved using a double Penning-trap system in which the electron’s g-factor is deduced from measuring the magnetic moment of the bound electron. The setup includes several ion creation possibilities for offline ion production, additional to the online injection of heavy HCI from the Heidelberg Electron Beam Ion Trap. The latter will deliver the ions of interest via an ion beam-line to the cryogenic double Penning-trap system, which is currently at the commissioning stage. Presently, proof-of-principle measurements are taking place in preparation for the first g-factor measurement. Among other things, necessary requirements for such a measurement will be the optimisation of the trapping potential, effective ion cooling, adiabatic ion transport as well as accurate knowledge of field inhomogeneities within the trapping region. These results and the current status of the experiment will be discussed.