Hannover 2020 – scientific programme
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A: Fachverband Atomphysik
A 28: Poster Session - Atomic Physics IV
A 28.29: Poster
Thursday, March 12, 2020, 16:00–18:00, Empore Lichthof
Realization of dual-species BEC for interferometry in space — •Jonas Böhm1, Baptist Piest1, Maike D. Lachmann1, Wolfgang Ertmer1, Ernst M. Rasel1, and The MAIUS Team1,2,3,4,5,6,7,8 — 1Institute of Quantum Optics, LU Hanover — 2Department of Physics, HU Berlin — 3ZARM, University of Bremen — 4DLR Institute of Space Systems, Bremen — 5Institute of Physics, JGU Mainz — 6DLR Simulation and Software Technology, Brunswick — 7Ferdinand-Braun-Institut, Berlin — 8DLR MORABA, Oberpfaffenhofen
Atom interferometry is a promising tool for measurements of the gravitational constant or the UFF. As the sensitivity scales with the squared interrogation time, conducting these experiments in microgravity is of great interest. The sounding rocket mission MAIUS-A demonstrated the first creation of a BEC in space and its use as a source for atom interferometry. Here, we present the current status of the follow-up mission MAIUS-B that extends the apparatus by another species to perform interferometry with K-41 and Rb-87. The steps to create a dual-species BEC, that includes to load atoms in a 3DMOT from a cold atomic beam created in a 2D MOT and using a sequence of polarization gradient and evaporative cooling, are discussed. Optimization routines relying on machine learning algorithms are highlighted.
The MAIUS project is supported by the German Space Agency (DLR) with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number:50WP1431.