BEC in Old HeidelbergBack to News
Authors and contributors: Alexander Kasper, Stephan Schneider, Christoph vom Hagen, Louw Feenstra, Joerg Schmiedmayer.
[Historical report created from GSU BEC Homepage:]
"On the 13th of May we have successfully achieved Bose Einstein condensation of 87Rb in a magnetic Z-trap. We trap the |F = 2, MF = 2> magnetic substate in a Ioffe Pritchard type magnetic microtrap (the Z-trap). We start our evaporative cooling cycle with ~ 108 atoms and find ~ 3 x 105 atoms in the condensate. The magnetic trap frequencies are: Transversal: 2π x 600 Hz, Longitudinal: 2π x 60Hz . The picture above shows how the condensate emerges from the thermal background as we decrease the temperature.
Comment to the picture below of the chip mounting: The monolithic wire structure (Z), which supplies partially the magnetic field for the Ioffe trap is below the gold surface. The gold surface is actually a set of additional smaller micro traps, also called "AtomChip".
Members of the group:
- Alexander Kasper
- Stephan Schneider
- Christoph vom Hagen
- Louw Feenstra
- Joerg Schmiedmayer
We also acknowledge help from:
- Markus Bartenstein
- Thorsten Schumm
- Bastian Engeser
For further information, see http://www.physi.uni-heidelberg.de/physi/atph/."
Posted: 11 Aug 2005 Date: 13 May 2002