Modeling the Single-Helical Axis State in the Reversed-Field Pinch

The classical paradigm of the reversed-field pinch as a chaotic plasma has been challenged in recent years by the observation of the high-confinement single-helical axis (SHAx) state in which the plasma spontaneously develops a helical core. A reconstruction of this state using a minimally constrained model that captures the self-organized nature of the SHAx state is presented.