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

Abstract

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 behavior. 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.

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Cited by in corpus (8)

• Cold and Ultracold Molecules: Science, Technology, and Applications
• Continuous Centrifuge Decelerator for Polar Molecules
• A cryofuge for cold-collision experiments with slow polar molecules
• Improved setup for producing slow beams of cold molecules using a rotating nozzle
• Velocity-selected molecular pulses produced by an electric guide
• Buffer-gas cooling of molecules in the low-density regime: Comparison between simulation and experiment
• Thermometry of Guided Molecular Beams from a Cryogenic Buffer-Gas Cell
• Propagation of radiation pulses through gas-plasma mixtures