European divertor target concepts for DEMO: Design rationales and high heat flux performance oleh J.H. You, E. Visca, T. Barrett, B. Böswirth, F. Crescenzi, F. Domptail, M. Fursdon, F. Gallay, B-E. Ghidersa, H. Greuner, M. Li, A.v. Müller, J. Reiser, M. Richou, S. Roccella, Ch. Vorpahl