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Characterization of a seeded pulsed molecular beam using the velocity map imaging technique

Lietard A. 1, 2 Poisson L. 2, 3 Mestdagh J.M. 2, 3 Gaveau M.A. 2, 3
1 Korea University [Seoul]
2 LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
3 DyR - Dynamique Réactionnelle
IRAMIS - Institut Rayonnement Matière de Saclay, LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
Abstract : An experimental study has been performed to characterize the density and the velocity distribution in a pulsed molecular beam generated by a source associating a pulsed valve and an oven placed just downstream. In its operating mode, the flow is alternatively in a supersonic and effusive regime. The Velocity Map Imaging (VMI) technique associated with laser ionization allows measuring the velocity distribution and the density of molecules as a function of time during the expansion. It gives us a very precise insight into the structure of the molecule bunch, and therefore into the nature of the expansion from which the molecular beam is extracted.
Keywords : Flow visualization Velocity measurement Atomic and molecular beam sources Ionization Ionizing radiation
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Journal articles
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https://hal-cea.archives-ouvertes.fr/cea-01401343
Contributor : Caroline Lebe <>
Submitted on : Wednesday, November 23, 2016 - 11:00:51 AM
Last modification on : Wednesday, December 9, 2020 - 6:18:02 PM

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CEA | CNRS | DSM-IRAMIS | CEA-UPSAY | IRAMIS-LIDYL | CEA-DRF

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Lietard A., Poisson L., Mestdagh J.M., Gaveau M.A.. Characterization of a seeded pulsed molecular beam using the velocity map imaging technique . AIP Conference Proceedings, American Institute of Physics, 2017, 1786, pp.060004-1-060004-6. ⟨10.1063/1.4967576⟩. ⟨cea-01401343⟩

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