A continuous source of translationally cold dipolar molecules
S. A. Rangwala, T. Junglen, T. Rieger, P. W. H. Pinkse, G. Rempe
Abstract
The Stark interaction of polar molecules with an inhomogeneous electric field is exploited to select slow molecules from a room-temperature reservoir and guide them into an ultrahigh vacuum chamber. A linear electrostatic quadrupole with a curved section selects molecules with small transverse and longitudinal velocities. The source is tested with formaldehyde (H2CO) and deuterated ammonia (ND3). With H2CO a continuous flux is measured of approximately 109/s and a longitudinal temperature of a few K. The data are compared with the result of a Monte Carlo simulation.
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