Self-Consistent Pedestal Prediction of JET-ILW

Self-Consistent Pedestal Prediction of JET-ILW

Self-Consistent Pedestal Prediction of JET-ILW 150 150 UKAEA Opendata

The self-consistent core-pedestal prediction model of a combination of EPED1 type pedestal prediction and a simple stiff core transport model is able to predict type I ELMy pedestals of a large database JET-ILW (ITER-like wall) at the similar accuracy as is obtained when the experimental global plasma b is used as input. The neutral penetration model [1] with corrections that take into account variations due to gas fuelling and plasma triangularity, is able to predict the pedestal density with an average error of 15%. The pedestal prediction of the hydrogen plasma that has higher core heat diffusivity and increased separatrix temperature compared to a deuterium plasma with similar heating and fuelling agrees with the experiment when the increased diffusivity and outward radial shift of the pedestal are included in the prediction. However, the neutral penetration model that successfully predicts the deuterium pedestal densities fails to predict the isotope effect on the pedestal density in hydrogen plasmas.

Collection:
Journals
Journal:
Physics of Plasmas
Publisher:
AIP (American Institute of Physics)
Published date:
16/07/2019