Design of the JET upgraded gamma-ray cameras

V. Zoita, M. Anghel, T. Craciunescu, M. Curuia, T. Edlington, M. Gherendi, V. Kiptily, K. Kneupner, I. Lengar, A. Murari, A. Pantea, P. Prior, S. Soare, S. Sanders, B. Syme, I. Tiseanu and JET EFDA contributors