Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Ultracold Atoms: Trapping and Cooling 2
Q 58.8: Vortrag
Freitag, 18. März 2011, 12:15–12:30, HSZ 02
A hexapole-compensated magneto-optical trap on a mesoscopic atom chip — •Stefan Jöllenbeck1, Jan Mahnke1, Richard Randoll1, Manuela Hanke1, Ilka Geisel1, Wolfgang Ertmer1, Jan Arlt2, and Carsten Klempt1 — 1Institut für Quantenoptik, Leibniz Universität Hannover — 2Department of Physics and Astronomy, Aarhus University
We realized a magneto-optical trap (MOT) on a mesoscopic chip structure which will be used as a starting point for experiments to trap and transport atoms in a magnetic conveyor belt.
Our MOT setup consists of nine millimeter-scale wires which generate a quadrupole field with minimized distortions. The wires are placed outside of our vacuum system above a steel foil which forms one wall of our vacuum chamber. A gold coating on the vacuum side of this foil allows for the standard mirror MOT configuration. Together with a pre-cooled beam from a 2D+-MOT, we achieve an initial loading rate of 8.4× 1010 atoms/s and a final number of 8.7× 109 captured atoms within 300 ms.
Since the MOT can be operated by only local magnetic fields, the wire structure will support a serialized production of Bose-Einstein condensates in the magnetic conveyor belt.