Collisional effects in the formation of cold guided beams of polar molecules

M. Motsch, C. Sommer, M. Zeppenfeld, L. D. Van Buuren, P. W.H. Pinkse*, G. Rempe

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

13 Citations (Scopus)
15 Downloads (Pure)


High fluxes of cold polar molecules are efficiently produced by electric guiding and velocity filtering. Here, we investigate different aspects of the beam formation. Variations of the source parameters such as density and temperature result in characteristic changes in the guided beam. These are observed in the velocity distribution of the guided molecules as well as in the dependence of the signal of guided molecules on the trapping electric field. A model taking into account velocity-dependent collisional losses of cold molecules in the region close to the nozzle accurately reproduces this behaviour. This clarifies an open question on the parameter dependence of the detected signal and gives a more detailed understanding of the velocity-filtering and guiding process.

Original languageEnglish
Article number055030
JournalNew journal of physics
Publication statusPublished - 14 May 2009
Externally publishedYes


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