Application of accelerator based neutron sources in fusion materials research - Surrey, E; Porton, M; Findlay, D; Letchworth, A; Davenne, T; Thomason, J; Roberts, S; Seryi, A; Marrow, T; Connolly, B; Owen, H (2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013, 2013)