Electron Scattering Cross Sections and Calculated Transport Data for a New Class of Cooling Gases*

Non-equilibrium nature of plasmas needed for numerous applications involving thermally sensitive targets has increased the need for complete sets of cross section data.  Modeling of such plasmas, especially kinetic modeling, requires complete sets of data normalized by the swarm technique.  At the same time one has to be aware of the limitations of the swarm technique such as non-uniqueness and dependence on the range of energies covered in the swarm experiment.  In this presentation we shall present newly determined sets of cross sections for some of the mores standard gases such as C₂H₆O (dimethyl ether-DME) as well as the newly synthesised gases belonging to hydrofluoroolefins (HFOs), perfluoroketones (PFKs) and perfluoronitriles (PFNs) (our presentation will include (like C₃HF₅ (HFC-1225ye) and C₃H₂F₄ (HFO-1234ze)) .  These new gases have to satisfy the requirements for their application as well as to be short lived in the atmosphere so that their footprint on the global warming is minimized and thus may be used as replacement for several more polluting gases.  The cross sections were obtained on the basis of the available data and the newly measured data by the group of Jaime de Urquijo as well as the group of Christian Franck. As these are pulsed Townsend (PT) experiments we shall also address the interpretation of the results of PT experiments under the influence of non-conservative collisions.

In collaboration with: J. De Urquijo, T. Hammer, M. Ise, J. Atic, S. Marjanovic, D. Maric, G. Malovic, S. Dujko, O. Šašic, S. Dupljanin