Electrostatic extraction of cold molecules from a cryogenic reservoir

L. D. Van Buuren, C. Sommer, M. Motsch, S. Pohle, M. Schenk, J. Bayerl, P. W H Pinkse, G. Rempe

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We present a method which delivers a continuous, high-density beam of slow and internally cold polar molecules. In our source, warm molecules are first cooled by collisions with a cryogenic helium buffer gas. Cold molecules are then extracted by means of an electrostatic quadrupole guide. For ND3 the source produces fluxes up to (7±47)×1010molecules/s with peak densities up to (1.0±0.61.0)×109molecules/cm3. For H2CO the population of rovibrational states is monitored by depletion spectroscopy, resulting in single-state populations up to (82±10)%.

Original languageEnglish
Article number033001
JournalPhysical review letters
Issue number3
Publication statusPublished - 20 Jan 2009
Externally publishedYes


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