A continuous source of translationally cold dipolar molecules

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  • 10 September 2002
Abstract
The Stark interaction of polar molecules with an inhomogeneous electric field is exploited to select slow molecules from a room-temperature effusive source. A linear electrostatic quadrupole with a curved section guides only molecules with small transverse and longitudinal velocities, whereas the fast molecules escape the guide and are pumped away. The source is tested with formaldehyde (H2CO) and deuterated ammonia (ND3). With H2CO a continuous flux is measured of approximately 10^9/s and longitudinal temperatures of a few K. The results are compared with a Monte Carlo simulation.

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