This report summarizes Type I edge localized mode (ELM) dynamics
measurements from a number of tokamaks, including ASDEX-Upgrade, DIIID,
JET, JT-60U and MAST, with the goal of providing guidance and insight
for the development of ELM simulation and modelling. Several transport
mechanisms are conjectured to be responsible for ELM transport, including
convective transport due to filamentary structures ejected from the pedestal,
parallel transport due to edge ergodization or magnetic reconnection and
turbulent transport driven by the high edge gradients when the radial electric
field shear is suppressed. The experimental observations are assessed for their
validation, or conflict, with these ELM transport conjectures. |