Affiliation: | aMax-Planck-Institut für Plasmaphysik, Materials Research, EURATOM Association, Boltzmannstraße 2, 85748 Garching, Germany;bFaculty of Materials Science and Engineering, Warsaw University of Technology, ul. Wołoska 141, 02-507 Warsaw, Poland;cForschungszentrum Karlsruhe, Institute for Materials Research I, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany |