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H模的发现为当今托卡马克实验和优化下一代托卡马克设计提供了改善能量约束的途径,对L-H模转变的机理探讨,逐步从唯象学向自治理论发展。等离子体转动与L-H-VH模转变密切相关。实验观察到L-H模转变期间极向转动速度及其梯度的突然增加以及增加的速度剪切对抑制微观湍流的作用。而在VH模期间,环向转动速度剪切在Spinup时刻随能量约束增强因子迅速增加,剪切穿透深度达ρ=0.65。在高βH模放电中,在r/a=0.8～
H-mode discovery provides a way to improve energy constraints for today’s tokamak experiments and to optimize the next-generation tokamak design, exploring the mechanism of L-H mode transition, and gradually evolving from phenomenology to autonomy theory. The plasma rotation is closely related to the L-H-VH mode transition. Experiments were conducted to observe the sudden increase of the polar rotation speed and its gradient during the transition of the L-H mode and the effect of the increased velocity shear on the suppression of the microscopic turbulence. During the VH mode, the shear rate of circumferential rotation increases rapidly with the increase of energy constraint at Spinup, and the shear penetration depth reaches ρ = 0.65. In high βH mode discharge, at r / a = 0.8 ~