Journal
EUROPEAN PHYSICAL JOURNAL D
Volume 31, Issue 2, Pages 365-373Publisher
SPRINGER
DOI: 10.1140/epjd/e2004-00130-3
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An electrostatic quadrupole is used to filter slow dipolar ND3 molecules from an effusive source and to guide them into ultrahigh vacuum. The molecules in the electrostatic quadrupole experience a Stark interaction which allows filtering of small velocities in the linear and bent sections of the quadrupole. With this technique we demonstrate a flux of approximate to10(10)/s with a longitudinal temperature of a few K. The technique and the set-up are discussed in detail, and the guided gas as well as the output beam are characterized. Improvements in the set-up are highlighted; as for instance cooling of the effusive source to below 150 K.
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