Design of ITER divertor VUV spectrometer and prototype test at KSTAR tokamak Changrae Seon, Joohwan Hong, Inwoo Song, Juhyeok Jang, Hyeonyong Lee, Younghwa An, Bosung Kim, Taemin Jeon, Jaesun Park, Wonho Choe et al. (9 more) Eur. Phys. J. D, 71 12 (2017) 313 Published online: 07 December 2017 DOI: 10.1140/epjd/e2017-70825-3