title: Self-Organized Stationary States of Tokamaks.
abstract: We demonstrate that in a 3D resistive magnetohydrodynamic simulation, for some parameters it is possible to form a stationary state in a tokamak where a saturated interchange mode in the center of the discharge drives a near helical flow pattern that acts to nonlinearly sustain the configuration by adjusting the central loop voltage through a dynamo action. This could explain the physical mechanism for maintaining stationary nonsawtoothing "hybrid" discharges, often referred to as "flux pumping."
authors.affiliation: Princeton Plasma Physics Laboratory, P.O.Box 451, Princeton, New Jersey 08543, USA.
authors.forename: S C
authors.initials: SC
authors.lastname: Jardin
authors.affiliation: General Atomics, P.O. Box 85608, San Diego, California 92186, USA.
authors.forename: N
authors.initials: N
authors.lastname: Ferraro
authors.affiliation: Princeton Plasma Physics Laboratory, P.O.Box 451, Princeton, New Jersey 08543, USA.|Max-Plank-Institut für Plasmaphysik, Garching, Germany.
authors.forename: I
authors.initials: I
authors.lastname: Krebs