Erlangen 2018 – scientific programme
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A: Fachverband Atomphysik
A 33: Poster Session II
A 33.11: Poster
Wednesday, March 7, 2018, 16:15–18:15, Redoutensaal
Towards Quantum Logic Spectroscopy of Highly Charged Ar13+ — •Peter Micke1,2, Steven A. King1, Tobias Leopold1, Lisa Schmöger1,2, Maria Schwarz1,2, José R. Crespo López-Urrutia2, and Piet O. Schmidt1,3 — 1QUEST-Institut, Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — 2Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 3Leibniz Universität Hannover, Germany
Precision spectroscopy of electric dipole-forbidden optical transitions in highly charged ions (HCIs) has applications in the study of fundamental physics and the development of new optical atomic clocks with extremely low systematic uncertainties. However, precision spectroscopy on HCIs is challenging since they are usually produced at megakelvin temperatures and do not offer strong cycling transitions for laser cooling. We are currently commissioning an experiment aiming at high-precision quantum logic spectroscopy (QLS) on HCIs, using Ar13+ as the first test species. Produced in the PTB electron beam ion trap (EBIT), one of the novel 0.86 T Heidelberg Compact EBITs, the HCIs will be extracted and decelerated through a beamline, injected into a linear Paul trap and sympathetically cooled by laser-cooled Be+ ions. A cryogenic system is operated with a pulse-tube cryocooler, mechanically decoupled from the Paul trap and located in a separate room together with the PTB-EBIT, and provides a trap temperature of below 5 K for long-term storage of HCIs. Ground state cooling of the logic ion Be+ has been achieved as a prerequisite for state preparation and readout via QLS.