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Q: Fachverband Quantenoptik und Photonik
Q 17: Precision Spectroscopy of Atoms and Ions II (joint session A/Q)
Q 17.5: Vortrag
Montag, 10. März 2025, 18:15–18:30, HS PC
Hyper-EBIT: The development of a source for very highly charged ions — •Luca Yannik Geißler, Matthew Bohman, Athulya Kulangara Thottungal George, Fabian Heiße, Charlotte Maria König, Jonathan Morgner, José Ramon Crespo López-Urrutia, Klaus Blaum, and Sven Sturm — Max-Planck-Institut für Kernphysik, 69117 Heidelberg
Quantum electrodynamics (QED) is considered to be the most successful quantum field theory in the Standard Model. Its most precise test is conducted via the comparison of QED calculations with the measurement of the free electron g-factor. However, this test is restricted to low electrical field strengths. Consequently, it is of utmost importance to perform similar tests at high field strengths.
Such tests can be performed using highly charged ions (HCI). Here, only a few or even a single one of the innermost electrons are left, experiencing the strong field originating from the nucleus. The ALPHATRAP experiment is a cryogenic Penning-trap experiment, which is dedicated to perform precision measurements of the HCI’s bound-electron magnetic moments.
Recently, we have measured the bound-electron g factor of hydrogen-like tin with ALPHATRAP to sub parts-per-billion precision. Our goal is to further advance such tests towards the heaviest HCIs such as 208Pb81+. For the production of 208Pb81+ an electron beam ion trap, Hyper-EBIT, is being constructed at the MPIK with planned beam energies of 300 keV and up to 500 mA beam currents. This contribution presents the recent developments of the Hyper-EBIT.
Keywords: Highly charged ions; Electron beam ion trap; Quantum electrodynamics; Precision measurments