Mainz 2017 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics II
Q 40.17: Poster
Wednesday, March 8, 2017, 17:00–19:00, P OG2
New apparatus for laser cooling and trapping of Dy and K atoms — C. Ravensbergen1,2, S. Tzanova1,2, M. Kreyer2, •E. Soave2, A. Werlberger2, V. Corre1,2, E. Kirilov2, and R. Grimm1,2 — 1IQOQI, Austrian Academy of Sciences, Innsbruck, Austria — 2Insitute for Experimental Physics, University of Innsbruck, Innsbruck, Austria
We have developed a new apparatus for producing mixtures of dysprosium and potassium atoms. Atoms of K are first cooled with a 2D+ MOT, which reduces the transverse velocities. A beam propagating along the longitudinal direction pushes atoms into the main chamber, where they are trapped in a 3D magneto-optical trap. We have achieved both a MOT of the bosonic 39K and fermionic 40K isotope. A Dy atomic beam is created in a high-temperature effusion oven, it is then slowed in a combination of transverse cooling and a Zeeman slower. In the main chamber atoms are trapped in a narrow-line 3D MOT. The beams with a 40 mm diameter are tuned to the 136 kHz linewidth transition at 626 nm. Because of the narrowness of the line, the laser is locked onto a high-finesse cavity. The lasers for the Dy MOT and for K are all fiber-laser systems. This brings the advantages of a linewidth of the order of 10 kHz, high beam quality, and both high mechanical and temperature stability.