A source for high precision atom interferometry in space*

Increasing the space-time-area in atom interferometers is one approach towards precise measurements of the universality of free fall. A way to achieve this is to perform the experiments with Bose-Einstein condensates in a weightlessness environment. The successful launch of the rocket mission MAIUS-1 in January 2017 marks a major advancement in this effort for space applications. During the six minutes of microgravity the creation of the first BEC in space, its characterization and the manipulation of it were demonstrated. As the results of the reproducibility and the level of control show this source can be used for high precision atom interferometry measurements in this challenging environment. A new apparatus for the next two MAIUS missions is currently being set up and uses in addition to Rb-87 also K-41 as second species. It is planned to study mixtures as well as sequential and simultaneous interferometry on macroscopic timescales. The developed technology and the studies on ground and during flight support future space missions.