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MO: Fachverband Molekülphysik
MO 24: Kalte Moleküle
MO 24.4: Poster
Thursday, March 13, 2008, 16:30–19:00, Poster C1
Production of a continuous guided beam of slow and internally cold molecules from a cryosource — •Christian Sommer, Laurens van Buuren, Sebastian Pohle, Michael Motsch, Joseph Bayerl, Pepijn Pinkse, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching
Dense samples of cold polar molecules offer new perspectives in physics [1]. Studies of cold collisions and chemical reactions as well as high precision measurements will benefit from these samples. Further cooling to the ultracold regime will lead to conditions where the long range and anisotropic dipole-dipole interaction becomes dominant and new phenomena could be observed.
We have developed a new source delivering a continuous beam of slow and internally cold polar molecules. In the source room-temperature ND3 molecules are injected into a cryogenic helium buffer gas where they are cooled in all degrees of freedom [2]. A fraction of the cold molecules is extracted by an electric quadrupole [3] and transported to a high-vacuum region outside the cryogenic source where it can, for example, be loaded into an electrostatic trap [4]. We will discuss the principle of operation, details of the set up, and present data of its performance.
[1] J. Doyle et al., Eur. Phys. J. D 31, 149 (2004)
[2] J.D. Weinstein et al., Nature (London) 395, 148 (1998)
[3] T. Junglen et al., Eur. Phys. J. D 31, 365 (2004)
[4] T. Rieger et al., Phys. Rev. Lett. 95, 173002 (2005)