Loading a K dipole trap from a MOT

POSTER

Abstract

We report the loading of a K crossed dipole trap directly from a regular K MOT. We start from a 300 $\mu $K MOT. In the sequence, we apply a molasses phase by varying the frequency and power of trapping and repumping beams, which allow us to cool the sample to 50 $\mu $K. Then the sample is loaded into a crossed broadband optical dipole trap. Our crossed beam configuration uses 25 W (at 1064 n, bandwidth of 2 nm) in each beam with about 50 micron waist radius of the focus and a depth of about 700 $\mu $K. In the final sample, we have about 2 x 10$^{6}$ atoms, a temperature of 10 $\mu $K and a trap lifetime of 200 ms. The sample will be used for cold molecule experiments.

Authors

  • Bruno Marangoni

    University of Sao Paulo

  • Carlos Menegatti

    University of Sao Paulo

  • Luis Marcassa

    University of Sao Paulo, University of S\~ao Paulo