Laboratoire Francis PERRIN
URA CNRS-CEA 2453
This website is no more mainteined. See LIDYL or NIMBE
Instrumentation
Contact: Lionel Poisson

State-of-the-art research project goes with instrumental developments. When possible these developments are shared to the community through patents or publications.

 


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

A. Lietard, L. Poisson, J.-M. Mestdagh and M.-A. Gaveau

AIP Conference Proceedings, 1786, 060004, 2016 [doi]

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.