Experimental and numerical characterisation of fluctuations in the SOL of ASDEX Upgrade during L-mode and ELMy H-mode

Experimental investigations of fluctuations in the scrape-off layer (SOL) and corresponding numerical turbulence simulations were performed for both ASDEX Upgrade L-mode and ELMy H-mode plasmas (ELM = edge localized mode). A fast reciprocating probe on the midplane manipulator was used with a probe head containing five Langmuir probes. The electron temperature in the SOL during L-mode plasmas and during an ELMy H-mode was analysed and discussed. In particular we compare the characteristics of turbulent fluctuations during ELM events and in between ELMs with those of L-mode data. Experimental data are compared by statistical analysis with 2D fluid simulations.