title: Evidence for separatrix formation and sustainment with steady inductive helicity injection.
abstract: The first sustainment of toroidal plasma current of 50 kA at up to 3 times the injected currents, added in quadrature, using steady inductive helicity injection is described. Separatrix currents-currents not linking the helicity injectors-are sustained up to 40 kA. Decreases in the n=1 toroidal mode of the poloidal magnetic field at higher current amplifications indicate more quiescent, direct toroidal current drive. Results are achieved in HIT-SI (with a spheromak of major radius 0.3 m) during deuterium operations immediately after helium operation. These results represent a breakthrough in the development of this new current drive method for magnetic confinement fusion.
authors: University of Washington, Seattle, Washington 98105, USA.
authors: B S
authors: BS
authors: Victor
authors: T R
authors: TR
authors: Jarboe
authors: A C
authors: AC
authors: Hossack
authors: D A
authors: DA
authors: Ennis
authors: B A
authors: BA
authors: Nelson
authors: R J
authors: RJ
authors: Smith
authors: C
authors: C
authors: Akcay
authors: C J
authors: CJ
authors: Hansen
authors: G J
authors: GJ
authors: Marklin
authors: N K
authors: NK
authors: Hicks
authors: J S
authors: JS
authors: Wrobel