Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 9: Matter wave optics II
Q 9.4: Talk
Monday, March 17, 2014, 14:45–15:00, DO26 208
A miniaturized, high flux BEC source for precision interferometry — •Jan Rudolph1, Ernst Maria Rasel1, and The QUANTUS Team1,2,3,4,5,6,7,8,9 — 1Institut für Quantenoptik, Leibniz Universität Hannover — 2ZARM, Universität Bremen — 3Institut für Physik, HU Berlin — 4Institut für Laser-Physik, Universität Hamburg — 5Institut für Quantenphysik, Universität Ulm — 6Institut für angewandte Physik, TU Darmstadt — 7MUARC, University of Birmingham — 8FBH, Berlin — 9MPQ, Garching
Atom chips have proven to be excellent sources for the fast production of ultra-cold gases due to their outstanding performance in evaporative cooling. However, the total number of atoms has previously been limited by the small volume of their magnetic traps. To overcome this restriction, we have developed a novel loading scheme that allows us to produce Bose-Einstein condensates of 4x105 87Rb atoms every 1.6 seconds. Ensembles of 1x105 atoms can be produced with 1Hz repetition rate. The apparatus is designed to be operated in microgravity at the drop tower in Bremen, where even higher numbers of atoms can be achieved in the absence of any gravitational sag.
Using the drop tower’s catapult mode, our setup will perform atom interferometry during nine seconds in free fall. Thus, the fast loading scheme allows for interferometer sequences of up to seven seconds – interrogation times which are inaccessible for ground based devices.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number DLR 50WM1131.