Erlangen 2018 – scientific programme
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A: Fachverband Atomphysik
A 28: Precision Spectroscopy V - highly charged ions (joint session A/Q)
A 28.3: Talk
Wednesday, March 7, 2018, 14:30–14:45, K 1.016
Ion sources and beamline of the ALPHATRAP g-factor experiment — •Tim Sailer1,2, Ioanna Arapoglou1,2, José R. Crespo López-Urrutia1, Alexander Egl1,2, Martin Höcker1, Sandro Kraemer1,2, Andreas Weigel1,2, Robert Wolf1,3, Sven Sturm1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik — 2Fakultät für Physik und Astronomie, Universität Heidelberg — 3ARC Centre of Excellence for Engineered Quantum Systems, School of Physics, The University of Sydney, NSW Australia
The Penning-trap experiment ALPHATRAP, located at the Max-Planck-Institut für Kernphysik in Heidelberg, 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. To enable measurements beyond the current thermal limits, laser-cooling will be implemented. To this end, a Laser Ion Source (LIS) based on a Nd:YAG laser is used to produce 9Be+ ions, which will subsequently be laser cooled inside the trap using a 313nm laser system. HCI, which cannot be directly addressed by the laser, will be sympathetically cooled by the beryllium ions. The LIS is attached to the existing beamline, which allows an external production and injection of the 9Be+ ions. Additionally, a table-top electron beam ion source has been used successfully to produce and inject ions up to 40Ar13+ into the trap. Finally, the HD-EBIT will be connected to the experiment in the near future to enable the transfer and subsequent measurement of heavy HCI.