Dimensionless parameter dependence of H-mode pedestal width using hydrogen and deuterium plasmas in JT-60U

Urano, Hajime; Takizuka, Tomonori; Kamada, Yutaka; Oyama, Naoyuki; Takenaga, Hidenobu; JT-60 Team

The characteristics of the spatial width of the H-mode pedestal were investigated in hydrogen and deuterium plasmas in JT-60U. Both the database analysis and the dedicated experiments on the mass scan indicated that the pedestal width depends very weakly on the plasma particle species or . Identical profiles of the edge iontemperature were obtained in the experiments with hydrogen and deuterium plasmaswhile the profile for the H-mode edge pedestal is not fixed but differs bythe factor of (which is the square root of the mass ratio). The experiment on edge scan was also performed. Higher plasma had higher pedestal value accompanied by greater pedestal width in spite of almost identical at the pedestal. Based on the experiments on the dimensionless parameter scan, the scaling of the pedestal width was evaluated as .