Abstract
We report an experimental study of peak and phase-space density of a two-stage magneto-optical trap (MOT) of atoms, which exploits the narrower ultraviolet (UV) transition at 323 nm following trapping and cooling on the more common transition at 671 nm. The UV MOT is loaded from a red MOT and is compressed to give a high phase-space density up to . Temperatures as low as are achieved on the UV transition. We study the density limiting factors and in particular find a value for the light-assisted collisional loss coefficient of /s for low repumping intensity.
- Received 12 July 2014
DOI:https://doi.org/10.1103/PhysRevA.90.033417
©2014 American Physical Society