Experiments on the DIII-D tokamak have advanced the operational limits of wide pedestal quiescent H-mode plasmas towards increased ITER relevance by simultaneously demonstrating well-matched plasma shape and net zero injected torque. Wide pedestal QH-modes are a compelling candidate regime for a future power producing device because they maintain a stationary pedestal without ELMs via additional edge transport. The pedestal is wider than what would be predicted from kinetic ballooning mode physics due to enhanced edge transport generated by broadband turbulence, a limit cycle oscillation, or some combination thereof. Compared to the double null shape, the lower single null shape is observed to have a lower density, narrower pedestal width, larger density fluctuations over a broad range of wavenumber, and operates closer to the peeling-ballooning instability boundary calculated from the simple pedestal scaling, , which is still observed to be wider than the EPED prediction.

在DIII-D托卡马克上进行的实验通过同时展示出良好匹配的等离子体形状和净零注入扭矩，将宽基座静态H型等离子体的操作极限提高了ITER相关性。宽基座QH模式对于未来的发电设备来说是一种引人注目的候选方案，因为它们通过附加的边缘传输保持了没有ELM的固定基座。由于宽带湍流，极限循环振荡或它们的某种组合产生的增强的边缘传输，该基座比根据动态气球模式物理学所预期的要宽。与双零位形状相比，较低的单零位形状在较低的波数范围内具有较低的密度，较窄的基座宽度，较大的密度波动，，但仍被观察到比EPED预测更宽。