Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 21: Poster I
Q 21.22: Poster
Dienstag, 9. März 2010, 16:00–19:00, Lichthof
A new Experiment for the investigation of ultra-cold Potassium Rubidium Mixtures — Georg Kleine Büning, •Johannes Will, Jan Peise, Wolfgang Ertmer, and Jan Arlt — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover
We present an experimental apparatus, which will allow us to investigate mixtures of 87Rb with the bosonic isotopes of potassium (39K, 41K) and also enable the use of Feshbach-resonances. In the experiment the desired isotopes are collected in a magneto-optical trap from the background vapour. A magnetic quadrupole trap is used to transport the pre-cooled atoms mechanically into a glass cell with better vacuum. There the atoms are transferred into a novel hybrid optical and magnetic trap. Subsequently sympathetic cooling will be used to bring the desired isotopes of rubidium and potassium to quantum degeneracy. Finally a magnetic field can be tuned to the Feshbach resonances to manipulate the interaction strength.
Particular attention will be given to the design of the novel hybrid trap, which recently allowed for the realisation of a BEC of about 1x106 87Rb atoms, and the microwave force evaporation method.