Hannover 2003 – scientific programme

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MO: Molekülphysik

MO 15: Ultrakalte Moleküle

MO 15.1: Talk

Friday, March 28, 2003, 14:00–14:15, B 302

A universal guide for slow molecules — •T. Rieger, T. Junglen, S.A. Rangwala, P.W.H. Pinkse, and G. Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching

Progress in cooling and trapping of dilute molecular gases has opened up new perspectives to the field of molecular physics. We have developed a continuous source of slow dipolar molecules  [1] as a first step in a cold molecule experiment. Here the Stark effect is exploited to select slow molecules from a thermal gas reservoir and guide them into an ultrahigh vacuum. In the experiment, molecules from an effusive source are injected into a bent electrostatic quadrupole guide which acts as a longitudinal and transversal velocity filter for low-field-seeking molecules. Simulations show that it is also feasible to guide high-field-seeking molecules by applying alternating voltages. However the velocities as well as the fraction of the guided molecules are much smaller, so that the experimental demonstration is a challenge  [2]. Here we report on progress in guiding high- and low-field-seeking molecules.

[1] S.A. Rangwala et al., ArXiv:Physics/0209041

[2] Loesch et al., Phys. Rev. Lett. 85, 2709 (2000); H.L. Bethlem et al., Phys. Rev. Lett. 88, 13003 (2002)