Large atom number dual-species magneto-optical trap for fermionic 6Li and 40K atoms

2011/03/03 by Armin Ridinger, Saptarishi Chaudhuri, Thomas Salez +5 · 1 citation
Physics and Astronomy · #cond-mat.quant-gas

paper · pdf · doi:10.1140/epjd/e2011-20069-4

published as European Physical Journal D, 65 223 (2011)

arxiv created 2011/03/03 · arxiv updated 2015/05/27

Abstract

We present the design, implementation and characterization of a dual-species magneto-optical trap (MOT) for fermionic 6Li and 40K atoms with large atom numbers. The MOT simultaneously contains 5.2x10⁹ 6Li-atoms and 8.0x10⁹ 40K-atoms, which are continuously loaded by a Zeeman slower for 6Li and a 2D-MOT for 40K. The atom sources induce capture rates of 1.2x10⁹ 6Li-atoms/s and 1.4x10⁹ 40K-atoms/s. Trap losses due to light-induced interspecies collisions of ~65% were observed and could be minimized to ~10% by using low magnetic field gradients and low light powers in the repumping light of both atomic species. The described system represents the starting point for the production of a large-atom number quantum degenerate Fermi-Fermi mixture.

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