1. Department of Plasma Physics, GSI Helmholtzzentrum für Schwerionenforschung; Darmstadt Germany
2. Institute of Problems of Chemical Physics; Russian Academy of Sciences; Chernogolovka Russia
3. Tomsk University; Tomsk Russia
4. Lomonosov Moscow State University; Moscow Russia
5. Moscow Institute of Physics and Technology; Dolgoprudny Russia
6. Department of Physics, Goethe-Universität Frankfurt; Frankfurt Germany
7. E.T.S.I.Industrials; University of Castilla-La Mancha; Ciudad Real Spain