Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 41: Poster Session IIIa
A 41.25: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Orangerie
Optical dipole trapping in a drop tower experiment — •Marian Woltmann1, Christian Vogt1, Sven Herrmann1, Claus Lämmerzahl1, and The PRIMUS-Team1,2 — 1Center of Applied Space Technology and Microgravity (ZARM), University of Bremen — 2Institut für Quantenoptik, LU Hannover
The PRIMUS-project develops an optical dipole trap for the use in a dual species (Rb and K) atom interferometer under microgravity conditions. For this purpose a trapping laser with peak power of 10 W at a wavelength of 1960 nm is used in an experimental setup for the Bremen drop tower. Combining an optical dipole trap with a microgravity environment offers significant advantages over current approaches. A dipole trap is capable of trapping all mF-states and features a superior harmonicity of the trapping potential. The latter is especially important for an effective delta-kick collimation, needed for the preparation of BEC-clouds with particularly low effective temperatures. As the trap is solely based on optical interaction, Feshbach resonances will become feasible in microgravity. Within the PRIMUS-project the first ever optical dipole trap in microgravity was realised. In this manner our project also serves as a pathfinder experiment for further dipole trap based cold atom experiments in different microgravity environments. With our poster we will give an overview of the experiment and report on latest experimental results. The PRIMUS-project is supported by the German Space Agency DLR with funds provided by the Federal Ministry for Economic Affairs and Energy (BMWi) under grant number DLR 50 WM 1642.