The Super H-mode, a regime with high pedestal pressure and stored energy, is explored on DIII-D and combined with an ion transport barrier in the plasma core to increase performance. A significant improvement of ion temperatures and confinement is facilitated by favorable conditions such as high rotational shear and high ion pedestal temperatures. As a result of a rise in density and simultaneous decrease in rotation, the ion transport barrier disappears during the discharge evolution, leading to a transition from a very high confinement state at early times, to a reduced but still high confinement phase. Additionally, in many discharges, a global magnetohydrodynamic (MHD) event consistent with the coupling of a destabilized internal mode to an edge localized mode causes a large energy loss and leads to a reorganization of the plasma into a lower temperature, higher density state. Depending on the magnitude of the global MHD event, the plasma edge collisionality can increase significantly and shift the operational boundary from the peeling to the ballooning side, which can be understood as a drop out of the Super H-mode channel into standard H-mode. Hence, in Super H-mode discharges with ion transport barriers, both the improved pedestal height and rotational shear contribute to the high stored energy. At very low levels of rotation, the confinement factor for SH modes is still expected to exceed standard H-mode by 20%–30%. With their overall stationarity and high-performance levels, Super H-mode discharges provide an attractive regime for ITER and may enable a more compact design of future fusion power plants.

在DIII-D上探索了超级H模式，该模式具有高的基座压力和存储的能量，并与等离子体核心中的离子传输势垒结合以提高性能。有利的条件（例如高旋转剪切力和高离子基座温度）促进了离子温度和限制的显着改善。由于密度的增加和旋转的同时减小，离子传输势垒在放电过程中消失，导致从早期的非常高的限制状态过渡到减少但仍然很高的限制阶段。此外，在许多放电中 与不稳定的内部模式耦合到边缘局部模式相一致的全局磁流体动力学（MHD）事件导致大量能量损失，并导致等离子体重新组织为更低温度，更高密度的状态。取决于整体MHD事件的大小，等离子体边缘的碰撞性可能会显着增加，并将操作边界从剥皮侧移到膨胀侧，这可以理解为从超级H模式通道退出到标准H模式。因此，在具有离子传输阻挡层的超级H模式放电中，改善的基座高度和旋转剪切力均有助于高存储能量。在极低的旋转水平下，SH模式的限制因子仍有望超过标准H模式20％–30％。