Integrated data analysis and equilibrium reconstruction on a millisecond time base are used to gain edge profiles with high spatial and temporal resolution. The measured radial electric field profiles for a series of discharges with different gas fuelling levels show their minimum at the position of maximal ratio of pressure gradient and density (∇p/n). The analysis of electron density and temperature profiles in between edge localized modes (ELMs) reveals a characteristic sequence of phases, starting with a fast recovery phase, a quiet pressure build-up phase and a strongly fluctuating phase before the next ELM breaks out. These phases are described in terms of profile development, the behaviour of maximal gradients as well as their positions.
Investigations on the edge kinetic data in regimes with type-I and mitigated ELMs at ASDEX Upgrade