SAMOP 2021 – scientific programme
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A: Fachverband Atomphysik
A 12: Highly charged ions and their applications
A 12.1: Poster
Tuesday, September 21, 2021, 16:30–18:30, P
Fundamental physics with highly charged ions — •Alexander Wilzewski1, Lukas J. Spieß1, Steven A. King1, Peter Micke1,2, Erik Benkler1, Tobias Leopold1, Michael K. Rosner2, José R. Crespo López-Urrutia2, and Piet O. Schmidt1,3 — 1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany — 2Max-Planck-Instituts für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 3Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
Highly charged ions (HCIs) increase the number of optical transitions that can be probed with optical-clock-like accuracy, they are particularly interesting for isotope shift measurements and King plot analyses [1]. In our experiment, we extract HCIs from an electron-beam ion trap (EBIT) and transfer them through a beamline to a linear Paul trap where they are recaptured and sympathetically cooled by laser-cooled Be+ ions. and We have subsequently performed quantum logic spectroscopy on a HCI-Be+ two-ion crystal [2]. We are currently evaluating the systematic uncertainties of our 40Ar13+ clock in order to determine the isotope shift between 40Ar13+ and 36Ar13+ with sub-Hz accuracy. Since Ca14+ offers many stable isotopes for a King plot analysis, we will extend the isotope shift measurements afterwards to this species, for which loading into an EBIT from a solid target was recently demonstrated, and a clock laser system is under construction.
[1] J. C. Berengut et al., Phys. Rev. Research 2 (2020), [2] P. Micke et al., Nature 578 (2020)