Rostock 2019 – scientific programme
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A: Fachverband Atomphysik
A 14: Precision Spectroscopy of atoms and ions IV
A 14.3: Talk
Wednesday, March 13, 2019, 11:00–11:15, S HS 2 Physik
The Alphatrap g-factor experiment — •Tim Sailer1,2, Ioanna Arapoglou1,2, Hendrik Bekker1, José R. Crespo López-Urrutia1, Alexander Egl1,2, Martin Höcker1, Bingsheng Tu1, Andreas Weigel1,2, 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 experiment Alphatrap, located at the Max-Planck-Institut für Kernphysik, aims to measure the g-factor of bound electrons in highly charged ions (HCI) up to hydrogenlike 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. So far, a table-top Electron Beam Ion Trap (EBIT) has been used successfully to produce and inject ions up to 40Ar13+ into the trap. Furthermore, a laser ion source (LIS) has been attached to the beamline and tested to produce and inject 9Be+ ions. These will be used for sympathetic laser cooling of the HCI which lack suitable transitions for direct laser cooling.
To produce heavy HCI, which requires ionization energies on the order of several 10 keV, the Alphatrap setup has been connected via a UHV beamline to the Heidelberg-EBIT. The extraction of the produced HCI, their transport and injection into the Alphatrap setup are in the final phase of the commissioning of which the first results will be presented.