SOL PROFILE AND FLUCTUATIONS IN DIFFERENT DIVERTOR RE­CYCLING CONDITIONS IN H­-MODE PLASMAS

The evolution of SOL density profiles and fluctuations have been studied at different recycling levels in 3 different tokamaks, ASDEX­Upgrade, TCV and JET, all operated in H­Mode. In all devices we clearly observe an increase of far SOL e­folding length at high fuelling with the divertor at least in high­recycling regime and high divertor neutral pressure. The observed variation is generally associated to an increase filamentary activity with indication of faster more frequent filaments in the far SOL. The relation of SOL turbulence with divertor and separatrix conditions will be discussed.