title: Observation of peak neoclassical toroidal viscous force in the DIII-D tokamak.
abstract: Observation of a theoretically predicted peak in the neoclassical toroidal viscosity (NTV) force as a function of toroidal plasma rotation rate Ω is reported. The NTV was generated by applying n=3 magnetic fields from internal coils to low Ω plasmas produced with nearly balanced neutral beam injection. Locally, the peak corresponds to a toroidal rotation rate Ω(0) where the radial electric field E(r) is near zero as determined by radial ion force balance.
authors.affiliation: University of Wisconsin, Madison, Wisconsin 53706-1609, USA.
authors.forename: A J
authors.initials: AJ
authors.lastname: Cole
authors.forename: J D
authors.initials: JD
authors.lastname: Callen
authors.forename: W M
authors.initials: WM
authors.lastname: Solomon
authors.forename: A M
authors.initials: AM
authors.lastname: Garofalo
authors.forename: C C
authors.initials: CC
authors.lastname: Hegna
authors.forename: M J
authors.initials: MJ
authors.lastname: Lanctot
authors.forename: H
authors.initials: H
authors.lastname: Reimerdes