Continuous guided beams of slow and internally cold polar molecules

Christian Sommer, Laurens D. van Buuren, Michael Motsch, Sebastian Pohle, Josef Bayerl, Pepijn W.H. Pinkse, Gerhard Rempe

    Research output: Contribution to conferencePosterOther research output


    In the last years we have developed a source which produces high-flux beams of electrically guided cold molecules. A molecular gas is cooled by collisions with a cryogenic buffer gas, after which an electric quadrupole guide selects slow molecules in low-field-seeking states and transports them out of the cryogenic environment. For formaldehyde we have demonstrated the high state-purity in the extracted beam by a laser-depletion experiment [1]. As an alternative to the laser-depletion technique, we have qualitatively confirmed internal cooling for other species as well, from time-of-flight measurements obtained at different buffer-gas settings. Here, we review the source, including its technical aspects and optimization, and present its versatility from results obtained with different molecules [2].

    [1] L.D. van Buuren et al., Phys. Rev. Lett. 102, 033001 (2009)

    [2] C. Sommer et al., Faraday Discussions 142, 203 (2009)

    Original languageEnglish
    Publication statusPublished - 11 Mar 2010
    EventDPG Frühjahrstagung 2010 Hannover: (DPG Spring Meeting) - Hannover, Germany
    Duration: 8 Mar 201012 Mar 2010


    ConferenceDPG Frühjahrstagung 2010 Hannover
    Other82. Jahrestagung der DPG und DPG-Frühjahrstagung der Sektion AMOP (Atome, Moleküle, Quantenoptik und Plasmen)
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