Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 42: Poster Session IIIb
A 42.12: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Zelt Ost
QUANTUS-2 - Ultra Low Expansion Atomic Source for Matter Wave Interferometry in Extended Free Fall — •Peter Stromberger1, Tammo Sternke5, Naceur Gaaloul4, Andre Wenzlawski1, Patrick Windpassinger1, and the QUANTUS-Team1,2,3,4,5,6,7 — 1Institut für Physik, Johannes Gutenberg Universität Mainz — 2Institut für Physik, Humboldt-Universität zu Berlin — 3Ferdinand-Braun-Institut, Leibniz Institut für Höchstfrequenztechnik Berlin — 4Institut für Quantenoptik, Leibniz-Universität Hannover — 5ZARM, Universität Bremen — 6Institut für Quantenphysik, Universität Ulm — 7Institut für angewandte Physik, TU Darmstadt
QUANTUS-2 is a mobile high-flux rubidium BEC source used for experiments under microgravity in the drop tower in Bremen. To further decrease the expansion rate of the BEC, magnetic lensing - also known as delta-kick collimation - is crucial for observations after long evolution times in the range of seconds. Long evolution times are desirable, because the sensitivity of atom interferometers enhances quadratically with the interrogation time. An observability of the BEC of up to 2.7 s after free expansion was demonstrated. We present new analysis methods and results from simulations to increase our understanding of the used magnetic lens.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economic Affairs and Energy under grant numbers DLR 50 WM 1552-1557.