In-trap phase-contrast images and
false-color plots of Rb-87 atoms undergoing Bose-Einstein condensation
in a ~7.4 Hz (radial) by ~14.1 Hz (axial) TOP trap. Atom number in the
BEC image is ~106.
- Atom: Rb87, |F=1, mF = -1>
- Trap: standard TOP trap (dB/dz=300G/cm, Bbias_final=5G)
- Method: 2 chamber, magnetic transfer from MOT cell to science cell
- Evaporative cooling: 60 seconds, RF + circle-of-death forced evaporation
- Condensate atom number: ~105 atoms on first observation, optimized to 10^6
- Critical temperature: ~200 nK on first observation
The UA BEC team. Seated in
front, L-to-R: Tyler Neely, Chad Weiler. Standing, L-to-R: David
Scherer, Brian Anderson.
Hexagonal lattice of vortex cores in a BEC, observed with absorption imaging and ballistic expansion. Created by first forming the BEC in a weak symmetric TOP trap, then by rotating an elliptical potential about the condensate. 23 Jun 2006