Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 12: Ultra-cold atoms, ions and BEC (with A)

Q 12.11: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

A new apparatus of Bose-Fermi mixture — •Haoze Chen — University of Science and Technology of China Shanghai Branch, Shanghai, China

We will introduce a new apparatus for investigation of lithum6 and potassium41 Bose-Fermi mixture. The whole system contains several novel developed technics. Lithum6 and potassium41 are precooled by a spin-flipped Zeeman slower and 2D plus MOT respectly and captured by 3D-MOT simultaneously. Lithum6 cloud is further cooled by UV-MOT, while potassium41 is further cooled by gray molasses, which enhance the phase-space density from 1e-7 to 1e-4. We then apply D1 optical pumping for both atoms to increase the loading efficiency and purify the spin state. Then both species are loaded in a magnetic trap, and transport from our MOT chamber to science cell, which has a much better vacuum and optical access. We start evaporate cooling of potassium41 in a plugged magnetic trap, while lithum6 is sympathetic cooled by potassium41. After 15s of evaporation, we have generated double degenerate gas with more than 2e5 pure BEC of K41 and 5e5 degenerate fermi gas with 10% Fermi temperature of Li.