The Open University (UK) University College London (UK) Leopold Franzens Universitaet Innsbruck (A) Freie Universitaet Berlin (D) Universita di Roma 'La Sapienza' (I) University of Aarhus (DK) J Heyrovsky Institute of Physical Chemistry (CZ) Universite Paris-Sud, Centre National de la Recherche Scientifique (F) Subnode to UAR: University of Cergy-Pontoise and Observatoire de Paris-Meudon (F) Subnode to UAR: Lab.Collisions Agrégats Réactivité, Universite Paul Sabatier (F) Subnode to URLS: University of Trento (I) Subnode to UIBK: Department of Plasma Physics,University of Bratislava (SK) Subnode to UCLP:Institute for Nuclear Research on the Hungarian Academy of Sciences,Debrecen (H) Subnode to FUB: University of Bonn (D)