Innovative Experimental Techniques

Home: Laboratory Astrophysics Chemical Kinetics Infrared Spectroscopy Experimental Techniques

Un aperçu du premier caisson CRESU construit ici à Rennes, avec Sébastien Le Picard, responsable de l’axe Astrophysique de Laboratoire.

A view of the first CRESU chamber constructed here in Rennes, with Sébastien Le Picard who coordinates the Laboratory Astrophysics research group.

We specialise in developing innovative experimental techniques, coupled with a variety of analytical methods (lasers, mass spectrometry, Fourier Transform Infrared spectroscopy, CRDS …), in order to determine data under extreme temperature conditions, from 5 to 2000 K! Here we provide brief descriptions of some of our main experimental techniques:

Our experimental setups are subject to continuous updating and modification, thanks to the excellent technical support which we enjoy. Other techniques under development here in Rennes include: pulsed versions of the CRESU technique, coupling of new ion sources to an FTIR spectrometer, long slit-jets, generation of a cold plasma in a long path-length optical (White) cell, implementation of Cavity Ring Down Spectroscopy (CRDS) with a high enthalpy source…

All these developments have two main objectives: [1] recreate the extreme temperatures encountered in a wide variety of astrophysical environments: interstellar clouds, circumstellar shells, brown dwarves, planetary atmospheres… [2] stimulate quantum calculations at the highest level to model the molecular interactions involved and thereby predict behaviour for unstudied systems or under conditions unattainable in the laboratory.

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