Discharges with negative central magnetic shear (NCS) hold the promise of enhanced fusion performance in advanced tokamaks. However, stability to long wavelengt

Discharges exhibiting the highest plasma energy and fusion reactivity yet realized in the DIII-D tokamak have been produced by combining the benefits of a hollo

Negative central magnetic shear (NCS) discharges with[Beta][sub N][le] 4, H[le] 3, and up to 80% of the current non-inductively driven are reproducibly produced