Comparisons of paleoclassical based pedestal model predictions of electron quantities to measured DIII-D H-mode profiles

作者：Smith S P^*; Callen J D; Groebner R J; O**orne T H; Leonard A W; Eldon D; Bray B D

来源：Nuclear Fusion, 2012, 52(11): 114016.

DOI：10.1088/0029-5515/52/11/114016

Accurately predicting the pedestal structure in high-(H-)confinement mode plasmas is of great importance for the modelling of future tokamak plasmas. The main predictions of a model of pedestal structure based on paleoclassical transport as the main transport mechanism are presented. Numerical evaluations of this model are compared with a database of measured DIII-D H-mode pedestal profiles. Across the database, the electron temperature gradient is overpredicted by a factor of 1.7 +/- 1.1 and the electron density by a factor of 2.1 +/- 0.7. These results are consistent with paleoclassical transport producing the minimum level of electron transport. Trends in the predictions indicate that some additional transport may be operative, especially in high beta(p) and low confinement plasmas.

• 出版日期2012-11