Düsseldorf 2007 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 27: Kalte Moleküle II (gemeinsam mit MO)
Q 27.3: Vortrag
Dienstag, 20. März 2007, 14:45–15:00, 6B
Electrostatic extraction of buffer-gas-cooled polar molecules — •Laurens D. van Buuren, Joseph Bayerl, Vincent Dugrain, Sebastian Pohle, Christian Sommer, Pepijn W.H. Pinkse, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany
High-density samples of cold molecules are required to investigate their collisional and chemical properties at low temperatures. Once polar molecules can be cooled to the ultracold regime, where the dipole-dipole interaction dominates, new quantum phenomena can be studied. Cold polar molecules are also of interest for high-resolution spectroscopy, metrology, and quantum computation [1].
We present first results with a new cryogenic source delivering a
dense and slow beam of internally cold molecules.
The beam is produced by combining two powerful techniques. Molecules
are cooled (translationally and internally) in a helium buffer gas
at low temperature (T ∼ 5 K) [3]. With an electric guide slow
buffer-gas-cooled molecules are filtered out of the (non-polar)
helium and transported to a high-vacuum region [2], where the flux
is analysed. Once the source is optimized, the cold molecules can
easily be loaded into an electrostatic trap [4] for further investigations.
[1] J. Doyle et al., European Physical Journal D 31, 149 (2004)
[2] T. Junglen et al., European Physical Journal D 31, 365 (2004)
[3] S.E. Maxwell et al., Physical Review Letters 95, 173201 (2005)
[4] T. Rieger et al., Physical Review Letters 95, 173002 (2005)
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