Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 14: Precision Spectroscopy of atoms and ions IV
A 14.6: Vortrag
Mittwoch, 13. März 2019, 11:45–12:00, S HS 2 Physik
Towards setup, characterization and operation of a highly charged ion beamline. — •Michael K. Rosner1, Sandra Bogen1, Steffen Kühn1, Julian Stark1, Moto Togawa1, Christian Warnecke1, Peter Micke1,2, and José R. Crespo López-Urrutia1 — 1Max-Planck Institut für Kernphysik, Heidelberg — 2Physikalisch Technische Bundesanstalt
Highly charged ions (HCI) have high sensitivity to quantum electrodynamics and other fundamental interactions, making some species candidates to test the time variation of the fine-structure constant α. They are a promising target for high precision laser spectroscopy, aiming to measure their narrow optical transitions using quantum logic spectroscopy, as recently been demonstrated on Ar13+.
While an electron beam ion trap (EBIT) produces ions in the necessary charge states, the spectral resolution there is limited by Doppler broadening. This requires the transfer of the HCI into a cooler trapping environment, in our case a Coulomb crystal of laser-cooled Be+ ions prepared in a superconducting Paul trap.
We present a beamline between an EBIT and a Paul trap we designed to transfer, bunch and decelerate the HCI while also providing vibration decoupling between the Paul trap and its environment. It consists of an arrangement of ion optics, diagnostic elements and a decelerating unit. We perform time-of-flight measurements in order to determine the charge state distributions of extracted ions as well as their kinetic energy spread.