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Wilmart_42181200_2017.pdf
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- Ionic complexes are charged species formed by interaction between ions and neutral ligands. These species take action in interstellar/interplanetary media, in solvation phenomena and nucleation processes and then, their spectrocopic study is a paramount importance in chemical physics. The production of ionic complexes in laboratory needs to set up techniques in order to obtain a high ion current at a low effective temperature. The media that allows these two conditions is a cold plasma. This plasma can be formed by cooling a gas using a supersonic isentropic expansion. This expansion of gas can be made by using a pulsed valve and then, ionized by using an ionization technique. In this master thesis, ionic complexes are produced via the generation of a cold plasma. The plasma is produced by using a pulsed supersonic expansion coupled to an ionization method. A first chemical characterization was done by using a high-resolution mass spectrometer that was designed and build during this year. A physical characterization was made by using imaging techniques. These first charaterizations are made to do spectroscopic studies of the ionic complexes produced in the beam.
Citations
Wilmart, D. (2017). Chemical and physical characterization of a cold plasma.