L-H transition threshold studies in helium plasmas at JET

Solano, ER; Birkenmeier, G; Delabie, E; Silva, C; Hillesheim, JC; Boboc, A; Carvalho, IS; Carvalho, P; Chernyshova, M; Craciunescu, T; de la Luna, E; Fontdecaba, JM; Henriques, R; Jacquet, P; Jepu, I; Kappatou, A; King, D; Lennholm, M; Lerche, E; Litherland-Smith, E; Loarte, A; Maslov, M; Diaz, FP; Parail, V; Pawelec, E; Rimini, FG; Shaw, A; Siren, P; Szepesi, G; Stancar, Z; Tholerus, E; Vartanian, S; Viola, B; Weisen, H