Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 9: Ultra-cold atoms, ions and BEC (with Q)
A 9.2: Poster
Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof
Towards Ultracold Interaction - Optical trapping of Barium Ions and Rubidium Atoms — •Pascal Weckesser, Alexander Lambrecht, Julian Schmidt, Leon Karpa, and Tobias Schaetz — Albert-Ludwigs-Universität Freiburg
In the last years several experimental groups investigated collisions between laser-cooled atoms and ions, leading to a better understanding of the atom-ion interaction in many aspects [1-4]. Due to the RF-confinement of the ions these systems have been dominated by an intrinsic heating effect [5], limiting collision dynamics on the order of a few milli-Kelvin. A purely optical and electrostatic potential for both ions and atoms should overcome this effect [6] allowing to investigate ultracold interactions, such as cluster formation of an ion binding atoms wihtin the common 1/r4-potential [7].
Here we present our experimental setup combining simultaneously trapped Ba+ ions and Rb atoms in a far detunded bichromatic dipole trap. We discuss the properties of this novel trap, methods for extending the ion lifetime as well as prospective experiments within reach with the presented setup.
[1] A.T.Grier et al., Phys.Rev.Lett. 102,223201(2009)
[2] C.Zipkes et al., Nature 464,388(2010)
[3] S.Schmid et al. Phys.Rev.Lett. 105.133202 (2010)
[4] W.G.Rellergert et al., Phys.Rev.Lett. 107,243201 (2011)
[5] M.Cetina et al., Phys.Rev.Lett. 109,253201 (2012)
[6] T.Huber et al., Nat. Comm. 5,5587 (2014)
[7] R.Cote et al. Phys.Rev.Lett. 89.093001 (2002)