title: Quiescent double barrier regime in the DIII-D tokamak.
abstract: A new sustained high-performance regime, combining discrete edge and core transport barriers, has been discovered in the DIII-D tokamak. Edge localized modes (ELMs) are replaced by a steady oscillation that increases edge particle transport, thereby allowing particle control with no ELM-induced pulsed divertor heat load. The core barrier resembles those usually seen with a low (L) mode edge, without the degradation often associated with ELMs. The barriers are separated by a narrow region of high transport associated with a zero crossing in the E x B shearing rate.
authors.affiliation: General Atomics, P.O. Box 85608, San Diego, California 92186-5608.
authors.forename: C M
authors.initials: CM
authors.lastname: Greenfield
authors.forename: K H
authors.initials: KH
authors.lastname: Burrell
authors.forename: J C
authors.initials: JC
authors.lastname: DeBoo
authors.forename: E J
authors.initials: EJ
authors.lastname: Doyle
authors.forename: B W
authors.initials: BW
authors.lastname: Stallard
authors.forename: E J
authors.initials: EJ
authors.lastname: Synakowski
authors.forename: C
authors.initials: C
authors.lastname: Fenzi
authors.forename: P
authors.initials: P
authors.lastname: Gohil
authors.forename: R J
authors.initials: RJ
authors.lastname: Groebner
authors.forename: L L
authors.initials: LL
authors.lastname: Lao
authors.forename: M A
authors.initials: MA
authors.lastname: Makowski
authors.forename: G R
authors.initials: GR
authors.lastname: McKee
authors.forename: R A
authors.initials: RA
authors.lastname: Moyer
authors.forename: C L
authors.initials: CL
authors.lastname: Rettig
authors.forename: T L
authors.initials: TL
authors.lastname: Rhodes
authors.forename: R I
authors.initials: RI
authors.lastname: Pinsker
authors.forename: G M
authors.initials: GM
authors.lastname: Staebler
authors.forename: W P
authors.initials: WP
authors.lastname: West