title: Sustained stabilization of the resistive-wall mode by plasma rotation in the DIII-D tokamak.
abstract: Values of the normalized plasma pressure up to twice the free-boundary stability limit predicted by ideal magnetohydrodynamic (MHD) theory have been sustained in the DIII-D tokamak. Long-wavelength modes are stabilized by the resistive wall and rapid plasma toroidal rotation. High rotation speed is maintained by minimization of nonaxisymmetric magnetic fields, overcoming a long-standing impediment [E. J. Strait, Phys. Rev. Lett. 74, 2483 (1995)]]. The ideal-MHD pressure limit calculated with an ideal wall is observed as the operational limit to the normalized plasma pressure.
authors.affiliation: General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA. garafalo@fusion.gat.com
authors.forename: A M
authors.initials: AM
authors.lastname: Garofalo
authors.forename: E J
authors.initials: EJ
authors.lastname: Strait
authors.forename: L C
authors.initials: LC
authors.lastname: Johnson
authors.forename: R J
authors.initials: RJ
authors.lastname: La Haye
authors.forename: E A
authors.initials: EA
authors.lastname: Lazarus
authors.forename: G A
authors.initials: GA
authors.lastname: Navratil
authors.forename: M
authors.initials: M
authors.lastname: Okabayashi
authors.forename: J T
authors.initials: JT
authors.lastname: Scoville
authors.forename: T S
authors.initials: TS
authors.lastname: Taylor
authors.forename: A D
authors.initials: AD
authors.lastname: Turnbull