1. Karlsruhe Institute of Technology; Institute for Applied Materials; 76344 Eggenstein-Leopoldshafen Germany
2. Max Planck Institute of Plasma Physics; Garching Germany
3. Department of Materials; University of Oxford; Oxford UK
4. Plataforma Solar de Almería-Ciemat; Madrid Spain
5. PLANSEE SE; Reutte Austria
6. Austrian Academy of Science; Leoben Austria