The EPED Pedestal Model: Validation, Super H-Mode, and Core-Pedestal Coupling
POSTER
Abstract
The EPED model predicts the H-Mode pedestal height and width by calculating non-local peeling-ballooning and kinetic ballooning mode constraints. Comparisons of EPED predictions to observations in more than 700 cases on 5 tokamaks, show agreement to a standard deviation of $\sim$ 20-25$\%$. The effects of plasma shape, collisionality, and impurities are explored. EPED predicts the pedestal can in some cases have multiple self-consistent solutions, including a higher pressure ``Super H'' solution, which can be reached by controlling density evolution. Comparisons of Super H predictions to DIII-D observations, and Super H predictions for other devices will be presented. Recently, the AToM project has coupled EPED to core transport models, enabling self-consistent prediction of temperature and pressure profiles, and global stored energy, across the confined plasma. Predictions for existing devices and for ITER are discussed.
*Supported in part by US DOE under DE-FG03-95ER54309, DE-FC02-06ER54873, DE-FC02-04ER54698.