Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster Session I

A 20.11: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1

Sympathetic cooling of OH- ions using Rb atoms in a MOT — •Jonas Tauch¹, Henry Lopez¹, Bastian Höltkemeier¹, Tobias Heldt¹, Eric Endres², Roland Wester², and Matthias Weidemüller¹ — ¹Physikalisches Institut Heidelberg, INF 226, 69120 Heidelberg — ²Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck

In this poster I will present the current status and first results of our hybrid atom-ion trap (HAITrap) experiment. Our setup combines an octupol radio frequency ion trap and a magneto optical trap (MOT). We can store up to 500 OH⁻ anions in the radio frequency trap, which provides sufficient optical access to superimpose laser cooled rubidium atoms in the MOT on the anion cloud. A dark spontaneous force optical trap (darkSPOT) configuration is used to bring most rubidium to the ground state, hence avoiding ion loss by inelastic collisions, as well as allowing higher densities up to 3·10¹¹ atoms/cm³. This setup allows us to investigate sympathetic cooling of molecular anions with five times heavier buffer gas atoms, which is predicted to be possible by localizing the ultracold buffer gas atoms in the center of the anion cloud.