Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 12: Ultra-cold atoms, ions and BEC

A 12.9: Poster

Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik

A reaction microscope for few-body Rydberg dynamics — •Max Althön, Kai Hawerkamp, Philipp Geppert, Cihan Sahin, and Herwig Ott — Department of Physics and Research Center OPTIMAS, TU Kaiserslautern

We report on the current status of our MOTRIMS-type reaction microscope experiment. Every experiment cycle starts with the preparation of a sample of ⁸⁷Rb atoms in a 3D-MOT, which is loaded from a 2D-MOT. The atoms can then be transferred to a crossed optical dipole trap. Using a 3-level excitation scheme, some atoms can be excited to atomic or molecular Rydberg states and photoionized by a short laser pulse from a high power CO₂ laser after a variable evolution time. Following small homogeneous electric fields generated by Wiley-McLaren-type ion optics, the produced ions are subsequently detected by a time and position sensitive micro channel plate detector. This tool allows both momentum- and position-resolved measurements of few-body Rydberg dynamics. In this context, we are especially interested in measuring momentum distributions of Rydberg molecule wavefunctions as well as momenta resulting from internal decay processes. Special focus lies on butterfly and trilobite molecules, which can be addressed efficiently due to the opportunity of exciting Rydberg p- and f-states. Apart from technical details of the fully assembled experimental setup, first results are presented.